I expose myself to challenges

That is the only way I could help to reduce my useless thinking.

The first time I consider seriously to become a Phd. I will study to become a Phd, simply because I need some challenges to help to kill my useless thinking.

I will get 8.5 for Ielts. I need some challenges to defeat useless thinking.
I need pressure. I could not bear Useless thinking any more.
I need big challenges to kill useless thinking.
I need. I will become a Phd for sure. That is a must. I must be healthy, free from coughing and blocking nose.
I will. I need challenges to overcome useless thinking.