A recent study found that one effective way to resist procrastination in future tasks is to forgive previous procrastination- because the negative emotions that would otherwise remain create an ugh field around that task.

I found the study recently, but I've personally found this to be effective previously. Forcing your way through an ugh field isn't sustainable due to our limited supply of willpower (this is hardly a new idea, but I haven't seen it referenced in my limited readings on LW.)