Maybe check out funny videos on youtube. I tend to do it when I am bored and don't feel like doing anything else.
One good series is HISHE.com (How it should have ended) - A series where they do videos about films, shows and games (although mostly films). It's self explanatory what part they are about. It's done for comedic purposes rather than a serious discussion.
I was surprised at this one seeing as they normally tend to keep them within the context of the media in question, but it's very funny.
Another funny series is Epic Rap Battles. There are two channels (season 2 got it's own) - Like HISHE it's comedic, and in this case they choose two historical or fictional people (voted by the audience in previous episodes comments) and as the title suggests, they have a rap battle.
This isn't my favourite but it was the first I saw so it's as good as any (It's from season 2 so a different channel than some of the others).
Alternatively try picking up something new such as a sport or something, but I know how difficult that can be when depressed. Motivating yourself to do anything at all can be next to impossible when it hits you hard.