Need help learning how to read books again

I used to be an avid reader, but years of high school and depression completely ruined that. I haven't been able to complete a novel since senior year six years ago. It's frustrating to me and I want to know how I can overcome my lack of focus and anxiety. I've heard I'm not alone when it comes to this sort of thing at least.

E: I wasn't expecting so many replies. Thank you, all of you, for the ideas.