Writing is a solitary pursuit. I'll usually spend hours at the computer writing, but when hit a block, it's time to take a break. Since I'm home by myself during the day, I'll usually take a break from the writing and do one of the following:
I have four cats, but the cat pictured above is Isabel. She's a chubby princess, and while she can be a huge pain in the butt, what made me fall in love with her was those beautiful green eyes, but secondly, she's a very 'quiet' cat. I can sit next to her, pet her for a few minutes and work through my writer's block. She rarely if ever stalks off before I've worked through my block.
I'll give the husband a call or a text. I rarely talk about the writing, but sometimes just talking to him will take my mind off of things and I can come back to my WiP with fresh eyes.
I'll look through my inspiration file. I have inspiration files for every book I write, but I also have a general inspiration file, filled with photos that I'll post here for my visual inspiration, like one of my favorites,
Or very often, I'll just scan through Twitter, Pinterest or Tumblr for a few minutes and get back to work. It usually only takes a few minutes to step away to find what was going wrong. If it takes more than that, I have no trouble just turning off the computer and giving it up for an hour or for the day. Some things are just not worth the headache, and the ideas always come with time.
What are your block breakers?