How to see the light at the end of the tunnel

Set a goal: set a goal that will be reached in years, and work on it.
Go out with your friends: you have to distract from bad thoughts.
Do a sport: soccer, basketball, gym or whathever you want.
Find an artistic hobby: playing an instrument, drawing, dancing or more...
Listen to music: it will relax you.
Stop overthinking: it will slowly make you weak, don't let it happen.

At some point, everyone faces a dark moment in their life.
Here's my point on about how to fight it and go forward: