CBT: Cognitive Behavioural Therapy.
If I tell myself I can do something, my brain will change. This works for anything. So for every problem I have, say what I want to achieve or how I want to overcome it. I say it often, every day. It will change my brain and therefore my behaviour.
These are all the same now, no need to click. Instead, look at their titles. It might give you an idea of what to do.