Is it not the case that if we think about ourselves a lot we become anxious?
Meditation is the practice of forgetting self.
What to think about? For it is in the remembrance of God that hearts find peace. Try this:
He is God: the Creator, the Initiator, the Designer. To Him belong the Beautiful Names. Glorifying Him is what is in the heavens and the earth. He is the Dignified, the Wise
[Quran]