How often do you sign up for something only to cancel or not show up? Each time you do that, you are setting yourself up for failure. When you sign up for something that you know will be a step toward achieving whatever your goal is and then you don't follow through, you are telling yourself that you can't do it.
Think back to last week, how many times did you tell someone that you were going to do something and then everything else became more important than what that something was. If that something was health related, then you told yourself by your actions, that you don't deserve to be healthy. See the connection?
Now of course; life gets in the way and we do find we need to NOT show up for something every once in awhile. But if you find that you are signing up and not showing up time and time again, why are you signing up to begin with? Because it's obviously important to you, scary or intimidating, yet you are not ready to take the plunge and that is why you keep cancelling on yourself.
Stepping out of your comfort can put you in a vulnerable position, just take one small step at a time and next time show up, if you find you can't handle it at least you put yourself first and gave it a try. You may even find it empowering and wondering why it took you so long to show up this time.
Your life, your choices.