1. Write before you get online (or watch TV, or whatever you do to unwind and waste time). Set a daily goal and be firm--make yourself write X number of words before you can log on to Twitter, Blogger, Facebook, etc. If you have time to be on social networking sites, you have time to be writing.
2. Read before you write. This one may not work for everybody, because I know some people don't read while they're working on a novel, but for me, it ends up being very helpful creatively if I soak myself with other people's words before producing my own. Reading reminds me of why I write--a love of stories and beautiful verbal expression--and helps me get in the right mood for handling words for a few hours. Stephen King advises that writers read 1 hour for every 2 they write, and I wholeheartedly concur.
3. Listen to music beforehand. I usually have a playlist for each WIP, and it helps me to sit with my eyes closed and just listen to a few songs that capture the mood of the scene I'm working on before I start. That way, my creative juices are flowing as soon as I start, so I don't sit there staring at a blank page.
4. Leave something for tomorrow. Don't write until you're completely drained of ideas. That's the best way I know to get writer's block. Leave something to think about and chew over creatively, so when you sit down to write again, you're mentally prepared to start. Usually for me, the story takes over from there, and I don't waste a lot of time sitting around staring at the screen.
5. Eat ice cream cake! (or whatever comfort food you prefer) I find this very helpful for difficult scenes.
What helps you write every day?