Some good advice on here...

If your trying to cut i recommend hitting those abs as much as possible. They are a muscle group that needs no break. Continually breathe when doing ab exercises in an exhale during the release and an inhale in the motion of the workout. This will cause your abs to contract and receive oxygen. Along with the normal "crunches" imply things that add weight to a crunch such as putting 10 lb weight on your chest and doing 10 crunches then taking the weight off immediately and do 10 more crunches. I do this to get my "largely sized" ab muscles. Instead of the flat ones i have the more round yet sizely abs. Also incorporate a better diet because your fat to calorie intake has to supplement the parts you want to train. Nice Abs= Low Carbs/Fats. Carbs get absorbed as energy unless it is used and then is transformed into fat. Just remember kill your abs they will forgive you when they are what you want. Plyometric exercises tone the core such as push ups where you go down and in the upward motion you push off the ground an sort of jump to do the 'clap' in the air. Tones the hell out of your chest. PLANKS!!! planks are also good- go into the normal push up position but instead of being on your arms rest on your forearms and contract your abs for time intervals. Rest then do it again... but enough of my useless bla blah blah theres plenty of exercises out there but diet is key.