There is no distinction between what you give your attention to and what you are thinking about.
Framework for thinking new idea
Your time is spent by giving your attention to things.
You can see the things that take up most of your thinking energy by looking at how you fill your time.
If you are watching TV, you are thinking about TV.
If you are reading a book, you are thinking about the book.
In this way, your thoughts are under your control. You can choose what you think about by choosing how your spend your time and attention.
If you want to think positive things about yourself, give your attention to positive things about yourself.
By giving time to things you care about, you set your focus on them and they can grow.