Lately I've been just fasting two days every week with good results so far. On fasting days I let myself have a little bit of food, like a can of tuna fish or something. For some reason, just doing one day didn't seem to make any difference- it has to be two days in a row, maybe I'm just going through the stored carbs in my muscles for the first day. This works best when paired with exercise, even on fasting days. But it's really hard to be on a diet all the time, because I just don't have the willpower to keep it up- being hungry all the time day after day after day- whereas if you're doing a punctuated fast you know there's a definite endpoint to it, and then you get to take a break before the next fast. It also means you don't have to spend time counting calories and stuff like that. When I get to my goal weight I'll keep fasting but maybe only once a month or something. Maybe physically it's no different than calorie restriction but psychologically, for me, it's way easier.