If you at a place in your life where you want to change something, whether it is to stop smoking or to choose a direction in life, you need to make a good, solid decision that sticks and that has the power to change your life.
At first, of course, you run through your options. You check what options are available to you, what they are about, and which one you most want based on your best sense of self. Then at some point, you need to take the step from prefering one option, to actually picking it and going with it. You have to choose the path you want to walk, and then you actually take that path. You put your feet on it and start walking.
Deciding is an active process.
There are no right or wrong decisions. This is your life, and you are living it. One decision takes you into one direction, and the other decision takes you somewhere else. Your decision should be based not on which one is the "right" one, or which one you are most comfortable with right now, but on where you want to end up. You pick a direction based on where it leads you, and if you want to go there.
When you are making a big decision, tell yourself that you are doing it for 30 days at first, rather than "two whole years" or "forever!". The concept of "forever" or even "years" is very difficult for the subconscious to understand, so it may get scared. It is much easier if you start with 30 days. This seems doable, and you can make it off on your calendar and give yourself a cookie when you made it. Then, you can re-make your decision for a longer time.
Here are some steps to making and enforcing a solid decision:
Imagine two people hitting on you in a bar. You can sit there all night, drinking, talking to them, having fun, and having both of them hit on you. You're getting a pretty clear idea of which of the two you like best, which is better looking, which is friendlier, which makes you laugh and seems like you'd have a really good time with them. You know which of them you would like to take take home. At that point you have to say "You! I pick you! Let's go to my place!" or you are going home alone.
For example: "I choose to walk A2f, and I let go of the other LPAs." or "I choose to become someone loud and impressive, and I let go of being quiet and polite."
The purpose of these steps is to get your conscious mind and your subconscious both to really get on board with your decision. Eventually, if you do these steps seriously and consistently, everything inside will start to understand that you're serious about it, and will get on board with it. If you find yourself doing what you decided in your dreams, it's a sign that you are being successful. Watch for it, and celebrate it when it does. Write it down in your journal so you remember that your decision is becoming real to you.
Good decisions have to be make over and over and over again. It is like quitting smoking: you have to keep decising not to smoke, every day, sometimes every hour. When you stop deciding for the option of your choice, your decision falls. Deciding is an active process. You do it over, and over, and over, and you keep making the same decision once you've made it. You keep making the small decisions that support your big decision. You keep putting one foot in front of the other on the path that you've taken, or you will not make progress on it.
Once you've made a decision and carried out these steps, also check out the Decision Timeline: the things that are almost certainly going to happen to you, too, after you make a big decision. Knowing what to expect lets you avoid the most common pitfalls.