Air conditioning and a really short duration power cut. *knocking on wood as she types*
Editing because I thought of other happy things. (Warning for diet related stuff.)
1. I had a dessert that was compatible with my diet for the first time in all the time I've been on said diet. The restaurant I went to was really loud, and very hesitantly I attempted to tell the waiter I wanted the brownie-with-whipped-cream without the brownie (>_>) and not only did he hear, he was very reassuring and despite that I was out alone in a pub type place (which for a woman in India at 10:30 pm is a weird thing) it was a painless and yummy experience. So I'm really satisfied and guilt-free about the diet for the first time in a loooooooooong time.
2. I fit into old, smaller sized underwear. And, if I do say so myself, I looked pretty damned good.