How often do you fast, and for how long?

I turned 40 a few months ago, and between a slowing metabolism, a more sedentary work role, holiday sweets, and wintertime lack of activity, I'm a few pounds above my ideal weight. So, for the past two weeks, I've fasted for ~24 hours from Fri. night to Sat. night. It's been fairly easy from a hunger perspective, but I'm wondering how others approach this. Obviously everyone's body is different, but I'm curious what kind of schedule others follow.

TIA