Sleep less, get fat.
I would love to blame my past year's weight gains on this, but I suspect that stress eating has had a more direct effect.
A la Twisty, I'm also going to note that this is yet another scientific study which focuses on weight gain in women. Does this phenomenon not affect men, or does our culture just think it matters a lot less whether a guy gains 33 pounds over a 16-year period? I kinda suspect it's the latter.
Still, I need to start sleeping more on a more regular basis.