The hardest part of doing any unpleasant task (for me at least) is getting started! So start in the laziest, slowest way possible to ease yourself into it. If you have a paper to write, fire up a Word document and open some fandom nonsense in another window. Work on the paper for ten minutes, and reward yourself with five minutes of fun stuff. At the end of an hour, you'll have done something productive and something entertaining at the same time. YMMV, but it works for me.