Be content with slow but definite progress — It’s near obvious your meals are going to contain more fat, more carbs and lesser protein than a meal which has meat. However, if you think you can make this work long term and are willing to commit yourself, you will definitely see amazing progress. Just make sure you’re in a slight caloric deficit (or surplus, if you’re underweight), consume sufficient protein (atleast 0.5gms of protein per pound of bodyweight) and hit the weights hard.
Many people ask themselves how lean should they be. The ideal body fat percentage varies based on gender and on how active you are. For instance, the average body fat for a woman is between 25-31%, while for a man it is between 18-24%. On the other hand, the ideal body fat percentage for a woman who works out is between 24-21%, while for men it should be between 14-17%.  To get a clearly defined six pack, a man needs to get to under 10%. 

We put this on the list because of how easy it is to manipulate the degree of difficulty. If a regular plank is too easy for you, lift an arm, or a leg—or an arm and a leg. Put your feet into a TRX and give that a whirl. Still too easy? Take your feet out, and put your forearms in. Each one of these progressions leads to a greater training stimulus to the abs.
Supplementation — It’s hard to get all your macros from food, especially while staying in a caloric deficit. More food means more calories, buying more ingredients, more cooking and lot many issues that you don’t really want to deal with on a daily basis. Supplements are called so because they are meant to supplement your nutrition and lifestyle, not act as a substitute. It’s imperative to find a fine line between the two for yourself and use them judiciously. I use the following supplements and have linked them to the exact brand, product and place I purchased them from. I am not paid to promote anything I’ve mentioned here. My sole motive is to tell you what I used and how it could possibly help you too.
Your core muscles allow you to stabilize your spine when you do pushups, shovel snow, walk up stairs, pick up your kids from the floor, and otherwise go about the motions of everyday life. "That's why the best ab exercises don't flex your spine, they keep your spine straight," says Durkin. The hip-up does exactly that while also sculpting your obliques and increasing your rotational control and stability.
If you want to get fit faster and burn more calories in less time, don't spend all your time in the so-called fat-burning zone. Instead, add some High Intensity Training (HIT) to your workouts a couple times each week. According to the American College of Sports Medicine, you can burn more calories in less time with short, high intensity exercise. You can also boost your overall cardiovascular fitness with this type of training. Be sure to slowly ramp up your intensity, however, or you could wind up with an injury.​
The inspiration for this exercise might come from skiing, but it's also an effective way to prepare your midsection for many sports, including tennis, softball, and golf. The reason: "It trains your abs, lower back, and hips to work together to rotate your body from side to side," says Durkin. And the more powerfully you can rotate, the faster you can swing and the harder you can throw.
Here’s a how a standard HIIT routine goes: one minute of strenuous exercise followed by 30 seconds of rest, repeated four to six times. You can do it for anything: sprinting followed by walking; biking full-steam followed by a casual pace; butterfly strokes followed by a doggy paddle. Or, if you really want to turn up the heat on HIIT, try out The Single Best HIIT Workout For Turning Back the Clock.
"My goals six years ago was to 'get abs' and I used to think cardio and crunches would get me there. But it wasn’t until I started lifting weights and varying my abdominal exercises that I started to see a major change. You don’t realize how much you use your core muscles in order to perform powerful rapid movements like deadlifts!" — Shante Franca, @shantefranca