Since we're talking about hacking your diet, this is something that has worked incredibly well for me. I fast on Mondays (most Mondays, not all)--I don't consume anything with calories. I drink water, and that's it. I usually end up eating dinner Sunday night and then the next meal I eat will be lunch or dinner on Tuesday.
The strangest thing to me is that I end up feeling really good on Tuesdays! It's somewhat difficult to describe, but when I wake up, I just feel good (and not particularly hungry). The best description I can think of is an extreme opposite of that feeling of "I ate too much!" Mondays are sometimes hard in the evenings when I do get hungry, though I don't get headaches (sometimes people report getting headaches when fasting). I do think that fasting is somewhat addictive, and I can see why pretty much every culture and religion around the world incorporates some form of fasting.
If you have never tried fasting for an extended period, I would give it a try. It's an interesting experience, and for me, not at all unpleasant.
I started fasting because I wanted to try it as an exercise of personal discipline, but I have ended up loosing around 30 lbs over the course of the first year (and keeping it off for 2 more years). I don't calorie count on other days, but I do--and did before fasting--eat reasonably healthily.