Every other month I get stuck in this meaningless void of worthlessness and struggle to do anything. All enjoyment is gone. What are some things I can do that doesn't take too much effort like going outside or devoting too much time to it. I tried going to the gym and it got stale after a month. I try walking outside but literally the moment I come back home everything falls to shit again.

music, videos, and games don't do it for me anymore. 

What are some quick little activities I can start right now to kinda nudge me out of this slump?