I wouldn't say I've exactly "solved" this problem, as I do still think relaxation and getting new information are valuable. But making Reddit more than just a ctrl+t -> r -> enter away is helpful.

A great book about all of this that was also helpful for further motivating me to try to be proactive here was Cal Newport's book Digital Minimalism [http://calnewport.com/books/digital-minimalism/].

It's not really a book about "quit Facebook", but rather "be intentional about the technology in your life instead of having technology happen to you. I've determined that Hacker News is a valuable use of my time within moderation, while Reddit doesn't really ever provide any sort of value, whether productive _or_ relaxing.