Planks are great (eblow planks, full planks, especially side planks) for working out your entire core, including your abs, hips, butt, etc. V-ups, oblique crunches, leg lifts (figure 8) are also good.
Your body craves balance. For example if your abs (the front side of your body) are stronger than your lower back (the back side of your body) your hips will tilt forward making your tummy look bigger than it actually its. Combat that with good lower back exercises. Check out ab-workouts-guide.com/core-exercises, the locust pose and bridge exercise will help.
Combine the workouts above with good cardio and a healthy diet and you can't go wrong.
F.Y.I. if a workout is too easy you may not burn enough calories to burn the fat off that you want.
Good luck and God Bless!
I love that saying about the 4, 8, 12 week thing! I will try to remember that better and not kick myself down so much!!
You can't choose where your body loses fat from. All you can do is stick with the workouts, build muscle, feed your body healthy fat and lean protein,maintain a calorie deficit and let your body do the rest!