For example, you may be so used to telling yourself you can't do something that you start to truly believe you can't. When in fact you are actually just choosing not to. Once you switch from "I can't" to "I'm choosing not to", you start to get out of your own way and see that you actually CAN and it was just a decision to make.  

 

Below is quick chart I made with similar phrases we may say on a daily basis about one thing or another. Each phrase is paired with a more positive one. Print this out, tape it to your bathroom mirror, put it on your fridge, at your desk at work etc. And start paying attention to when you are using the negative phrase and see if you CHOOSE to start using the positive one. 

 

You might be pleasantly surprised by the outcome.