Healthy eating and healthy exercise

So help me here. What worked for you and what didn't. I do not like the idea of extreme dieting (ie HCG diet). I try to get to yoga and pilates a couple times a week but it has been getting harder to get there on weekends. I am going to start going during the week but what else? Has anyone done the P90X or Jillian Michaels's 30 day challenge. Talk to me! Maybe we can all do something together!