crunches helpe me the best and hang from a pull-up bar and raise your knees to your chest. I stated off doing 100 of each a day for a week then it got easy. Then moved on to 200, then 500, then 1000 cuz it gets alot easier. I was getting ripped, but then quit and got a gut lol I need to start again. It sounds like a lot of work but just do them every commercial on tv or something like I did!