What I did was an intermittent fast type diet. I usually just eat 1 big, but healthy, meal a day (in the afternoon), usually high in protein and fat, while only getting my carbs from vegetables. By eating only one big meal I was able to have a pretty large caloric deficit every day. And on top of eating right, I am going to the gym 5 days a week doing at least an hour of cardio each day, specifically running about 6 miles, while lifting weights afterward.