In addition to what others have mentioned (a.choose something you´re motivated at b) cut down the tasks into small tasks c) think of the benefits, and/or use a visualization technique which is very important) I would add:
a) be convinced that it´s necessary to stick to what you´re doing (just by asking the question on fluther, it sounds like you’re starting to believe it’s necessary)- you brush your teeth every day (rhetorical question/statement) because you´re convinced your teeth will fall out if you don´t. People finally stick to eliminating the habit of drinking or smoking because they´re convinced.
b) Self Confidence (find ways to believe that you really can do the task, and that what you´re doing is good enough. Emphasize the importance of doing something rather than only the results (that´s the opposite of what we´re usually told, but you won´t do things if you think that you might make a mistake). Even if things don´t turn out too well, sometimes it´s important that you kept the ball rolling. Think of the things you are good at sticking to…
In addition to that, there are some good books on procrastination that might help: a.Procrastination by Jane Burka and Lenora Yuen. b.Awaken your Stronger Self.