I used to have a drink. Actually, years of drinking was the main cause of my writer's block. Once I stopped pouring the liquor, the words started flowing. When I hit a wall and I have word constipation -- and I accept that the words aren't going to come -- I go to the gym. It's about the same as the age-old prescription of many writers: go for a walk. While I'm at the gym (and I hate working out), I start to work out the problems I was having on the page. I rush to finish my work out and run home before my "brilliant" solutions start to evaporate.