>>12717301for the first day, do 1 set for each body part you want to work out (squats for a good butt, sit-ups and crunches for a flat abdomen aka lost of midriff points, etc). Minimum is 10 reps, but really do it until you feel tired. Always do more reps than the previous day. When you reach like 50 reps (or some other number that you feel satisfied with), add another set and start over with that set's rep count.
It's what I did when I wanted to get stronk for personal reasons, and it worked until I lost motivation.