This is a very good thread.

I'm used to focusing on what makes me feel bad instead of why I can feel feel good. Smiling does help it puts you in a better mood instantly.

Another thing you can do is put together an accomplishment list. Simple things that just pop into your mind and don't worry if it isn't a HUGE accomplishment. Examples:

-Painted Bedroom
-Found a good doctor
-Learned how to make a new meal