I normally do just 500 reps with a few minute breaks in between each 120 reps or so. Then I do the sit ups all at once. Its like half an hour total. I'm normally done with everything by 7AM. I do these reverse sit ups too where I work out my egs. So its like 40 regular sit ups and 40 leg work outs. I think there called oblique sit ups. If I get bored during the day then thats when I'll do additional reps or sit ups like I did yesterday.