I know that bikini season is approaching fast. I also know that we are all looking to get those abs in tip-top shape; with this in mind, many of us have the tendency to go a little ab crazy right now. However, if you overwork them, you may be doing more harm than good.
The abs are like any other muscle in the body -- Intense work followed by a period of rest and recuperation (at least 48 hours) is the best way to develop them. Working them out on a daily basis is not a great idea because you are not allowing for that essential rest time. Think about having an intense "ab" day once or twice a week -- This would be a day that you only focus on exercising your abs, proceeded or followed with at least 30 minutes of cardio, of course.
I know it's tempting, but resist the urge to do those once obligatory 100 crunches at the end of your workout every single day. You and your abs can thank me later.