M.R.
Rule #1 - You cannot 'spot reduce'. It simply isn't possible! Well, of course, unless you have a tummy tuck.
I absolutely do not mean to be rude when I say this, but most women who want to work on their midsection usually have a little bit of pesky, lingering fat in the area. The two most important things to deal with the excess fat issue are to 'eat clean' and include fat-burning cardiovascular exercise daily.
Clean eating means you eat food that is as close to its natural state as possible. In other words, no processed food or junk food. Clean eats can be found primarily along the perimeter of the grocery store. If your nutrition plan is not under control, you will never have the midsection you dream of.
Cardio must be a part of your daily routine. Make sure that you are doing steady state cardio activities like power walking, biking, jogging, the elliptical, etc.