What do I do to relax myself? Well, first and foremost I'll more than likely read something. It can be either some fanfiction online, a book I have in my hands, or a magazine. Reading let's me take my mind off of stuff and focus intently on what it is I'm reading.
Also another thing I tend to do sometimes is, of course, play video games. It does the same thing like a piece of writing does, it makes me focus on what's going on in the game instead of me.
Daydreaming is another thing I tend to do to relax myself. I let myself drift off to other worlds, most of the time I do this to compose my own stories or fanfictions in my head or to figure out how I'm going to make something work in one of my stories, etc.
The last things I really do that help me relax is writing and drawing. Writing allows me to focus on the characters and situations that I'm writing about and since I'm really nitpicky about things when I write I can get really into it at times. Drawing allows me to focus on what is I'm drawing, be it a character out of my head, a sketch of something, or my attempts to draw from real life and like my writing is, I'm really nitpicky about that too.
And I think that's about it. If there's anything else I've missed, I'll add it when I think about it.