A recovering procrastinator herself, author Rita Emmett gives this advice in her Procrastinator's Handbook (Walker & Co.): Think STING!
S: Select just one thing to do. Even if it's one small thing. Do just that. In a multi-faceted project, select a single component. Once you get started, you may want to finish the whole task, and if you do, great. If not, you still did one part of it.
T: Time yourself. Set a timer. Give yourself a set amount of time to do the job. Even if you have a job that take two hours, setting a timer for 30 minutes gives you the chance to quit if you want to quit. You will already be further ahead than if you hadn't started.
I: Ignore everything. Don't make a phone call, send an e-mail or read anything.
N: No breaks. They make jobs last longer. They are another reason a job takes so long.
G: Give yourself a reward. Watch a movie. Spend time doing something you like.
Do your most dreaded task first gets it out of the way. That cuts down on the dread time. The dread of doing something actually uses up more time and energy than the task itself.