If I'd allowed myself to go out and see people once every two days or so, I'd probably have been more productive than when trying to work full time.)
Probably. The most successful diet-control routine I ever operated on included a scheduled monthly Indulgence, in which I went out for dinner with friends and ate whatever the hell I wanted.
Related to: Make an Extraordinary Effort, On Doing the Impossible, Shut up and do the impossible!, Humans are not automatically strategic.
http://theferrett.livejournal.com/1587858.html
Excerpt:
Recommend reading the whole thing.