Contrary to what those late-night exercise equipment infomercials might have you think, you can't target any particular area for weight loss. When you burn more calories than you take in, your body will gradually start to lose weight all over. Though it would be nice to force your body to shed only belly fat so you can fit into your favorite jeans, that just isn't how it works.
While cardio workouts won't specifically target your belly fat, they'll get your metabolism revving and help your body shed extra pounds. Include a cardio workout most (if not every) day of the week. Remember, you're not glued to one routine. In fact, it's good to vary the activity and intensity of your workouts. Good choices include walking, running, biking and swimming ... but any aerobic activity will do.
A good strength training routine is also effective for weight loss. When your muscles are toned, your resting metabolic rate increases. Subsequently, you burn more calories even when at rest. Even if your priority is to lose belly fat, it's important to have a balanced strength training routine that targets all of your muscle groups.
You can, however, incorporate exercises to strengthen your core. While they won't help you to specifically lose belly fat, they will tighten your tummy muscles so that, after you lose the excess belly weight, you'll be left with a sexy, toned midsection.