Perhaps there is a methodical, step-wise process for progressing through personal change. From my observations, however, any methodology dealing with human cognitive processes is, at best, theoretical. At worst, most methodologies fail because they require superior human discipline... the kind of discipline that few of us possess for sustainable periods of time.
However, rather than being satisfied with the notion that there is no hope for you--and one can sometimes feel at peace when giving up in a struggle--what you need to realize is that you have not yet found a methodology that works for you. In reality, our thoughts combine, our activities dart back and forth among rungs on a pyramid, and we switch context quickly based on what seems important at the moment. Our personal growth and change patterns, much like our thinking, is network-like in nature; it is not sequential, as most theories require. This is who we are; imposing a strict discipline if this is not your style is like trying to fit a square peg in a round hole.
Keeping this in mind, let's work through a few basics of personal change. By basics I do not mean "step 1;" as I said before, I don't believe personal change follows a "neat" step-wise process. By basics I simply mean certain notions that are important to remember in your quest for personal growth; you may see these themes time and time again on the journey.
1. There is no single path for growth... you must build your own from building blocks
I believe that the journey of personal growth is traveled on a road you must build yourself; there is no pre-built highway. There are, however, large chunks of concrete that you can assemble. The inventory of building blocks can be as small or as large as you wish it... but the objective is to carefully select those blocks that are sturdy and practical. It might be easy to think that if you follow the step-by-step program laid out in a book or a tape series you will reach your destination. You may, but oftentimes you won't stay there very long... because the program is not custom-tailored to your needs. Building your own path probably takes no more effort than copying someone else's. However, the outcome will be more sustainable if you do the former.
2. Believe no one at face value... TRY each idea that sounds plausible and discard what doesn't work... Experiment
We have become a nation of followers, a society of star-gawking sheep who stand in awe of other people's ideas and create personality cults around everyone from Hollywood celebrities to politicians to business leaders and so on. We believe what the media tells us or, if not, we refute everything someone says simply because they are labeled a Republican, a Democrat, a religious man, a non-religious man, a socialist, a capitalist, an expert... you get the picture.
Everyone has a vested interest (however little) in having people believe what he or she is saying. This is not necessarily bad, as long as: (a) you recognize that there is an alternative motive at work; and (b) you critically evaluate the idea for itself before accepting or tossing it. Your boss wants to persuade you of her views, because this increases your productivity and her results. Your professor wants your belief so he can sow intellectual seeds and become the father of a generation of thinkers. Your parents want your agreement so they can feel good about raising someone who shares their views. Your friends want your acquiescence because it reinforces their own world view. And so on. In fact, you also want other people to agree with you, for various reasons: it gives you an ego boost, it provides external validation about your world view, and so on. The important thing is to realize that there is an alternative motive to every message or idea you hear out there. The presence of ulterior motive(s) is not intrinsically bad; it's just how people operate.
Knowing this, the goal is to experiment with ideas and see what works for you. Experimenting is easier when an idea doesn't take too long to implement. This is one reason why I am leery of programs that require weeks or months: they are difficult to implement or prove. We often have a sense of misplaced duty, of wanting to follow others because of the good things they've done for us, the accomplishments they've had, or for other reasons. We shy away from trying certain actions because others would speak poorly of us, or would disapprove, or would sneer at us in disdain. Placating someone is the wrong reason to do or not do something; it is a waste of time. You owe it to yourself to find the truth... to learn how things really work for you... and to be who you want to be.
As you experiment, keep in mind that an idea that succeeded in one situation may not succeed in another... and an idea that failed one time may not fail a second time. The sometimes-frustrating aspect of human behavior is that we are often unpredictable... and so are others. That's one reason why you should have several tools in your toolbox, and try each one until you find the right one that fits the situation.
3. Separate emotion from action
We are part of a society whose self-help bookshelves are filled with materials on improving your self esteem, your confidence, your motivation, and so on. The very notion that your self esteem (or other parts of your personality) needs help indicates that something must be wrong with you. Building on the principle of "everyone has an ulterior motive," see the message for what it is: an attempt to exploit your weaknesses for profit. Each of us is weak in various areas: some are afraid, some are lonely, some are too optimistic, some are too pessimistic, some are aggressive, some are passive, some are too extroverted to be taken seriously, others are too introverted, and so on. The quest for the "perfect personality" does nothing but line the pockets of certain individuals and creates pain and suffering for the rest who never attain that paragon of "perfect human." There is value in wanting to change... but don't do it because you see a book and think to yourself, "I wish I were that way."
As part of the solution, you need to separate the emotion from the actions you will take. You should no longer focus on having "self esteem," or "being confident" or "being an extrovert." Those are emotions that, frankly, are not in your control; if you could summon positive emotions at will, you wouldn't feel the way you do. Straining to control something that is not controllable creates psychological pressure... the very pressure that ends up sabotaging you. Instead, ignore your emotions; accept them if you have to... just don't put much stock in emotions. Instead, focus your energies on actions, as described below. Your emotions may follow suit, or they may not; it doesn't really matter. Emotions are fickle; don't give them another thought. What about emotions of sadness, disappointment, regret, bitterness, or such? Much like you can't control positive emotions, you can't control negative ones. So, either feel them until they pass (few emotions last forever), go to a psychiatrist to get medication, try to do something to forget about whatever is causing that negative emotion, and so on. Negative emotions are not trivial, nor can they be diminished with words. Over time, the point is to ignore concentrating on your emotions.
Action is where your should focus your energies. When you feel that you don't have confidence, what you're actually secretly wishing is that you're able to do a certain kind of activity or have some sort of result. So, whenever you feel a personality shortcoming, identify what outcome you're wishing you had. It would help to write this down... but it's not required; you knowing it is enough. Once you do, the next step is to decide if you really want that outcome, or if you just think you do. If you're unsure, assume you want it... just to be safe. Then your challenge is to accomplish that outcome. We'll discuss some tools for this later.
4. Decide whether you want to change... and why
Change through action does not come easily. It's even harder when you really don't want to change, but only think you do. If you're content with your current state, that is great... more power to you! You need not change because someone told you to, or because you think it will impress someone. The only meaningful motivation for change should be because you want to. You may feel that you don't deserve a better situation. If so, that's okay; that means you don't need to change. Until you come to the realization that you want to change, you don't need to do so. Continue doing what you're doing.