Easy, I take some time off. I like blogging because I can do it on my own schedule. Once it starts feeling like a job, then I take a break. This is my "for fun" thing to do. If it isn't fun, then I don't do it.
That being said, after my break, then I generally start with fun stuff like this challenge, or posts about my pinterest boards / movie castings / playlists. Something fun. Fun for me to do and fun for you to read!