Yep. Drink water, eat better, and do strength training. Think compound exercises like squat, deadlift, bench press, overhead press, etc. They build muscle and strength the best and are the most efficient if you're short on time. There are all kinds of programs out there. Starting Strength, Wendler 5/3/1, etc. Pick one to try and stick with it for six months to a year and you'll see results.