In my experience, procrastination seems to keep me from doing any task that can't be done quickly, whether or not it's important. For example, I can't play Dwarf Fortress if I have anything important to do. Is there any sort of trick to procrastinating with significant things, or am I just a different kind of procrastinator?

Edit: Also, I have no trouble doing things with a deadline (though I tend to wait until it gets close). I procrastinate things without a clear deadline, and things that I have plenty of time to complete. The former is my main problem. I think I'm just a different kind of procrastinator.