When I'm having trouble getting started on a project, it helps me to set the kitchen timer I have on my desk commit to working on it for just that period of time, even if it's only 20 minutes. The timer is also great for limiting time spend online.
My kitchen timer is a lady bug. Somehow, that makes this disciplinary tool a little friendlier. Make friends with your timer!
And, actually, I have two of them, one on the desk and one in the hallway, so that I don't have to look for one when I need it.