For me that was video games. So I played final fantasy and other games a great deal and found that the issues I was thinking of often did start to fade over time.
I don't know if it was the fact that the task required my attention so much or a sort of zen experience I could get with the game ... or just time passing, but it felt like it worked.
The only downside I felt was how not "in the world" I was at that time. Not really socializing much and etc in favor of drowning myself in video games.
Ultimately I think it helped me cope, but I also was aware that it was a very alluring sort of way of life to work, school, escape into video games, and nothing else.