Cut out high sugar foods and drinks. Soda and stuff.
Aim for a calorie deficit, 200 to 400 preferred. If you're not looking to build muscle, cardio is a good way to go (try some mountain biking or regular cycling. It's fun and hard to get bored of.)
Cut the amount of food you eat each meal. Sometimes you'll feel hungry enough to eat 3 cheeseburgers, but only eat 2 or just 1 if you can help it. It's best to eat a small portion of a meal then give your body time to process it and decide whether or not its still hungry. The reason i say this is that you will STILL feel hungry in the moment and we often don't give our stomachs time to digest. Do this and you'll find that you don't nearly need to eat as much as you normally do.
Get up on time. While it's not an issue for those who are use to getting up early, if you're in the habit of sleeping-in it WILL cause you to retain a lot of weight and it will throw your meal schedule of track. Don't skip breakfast either because "It's the most important meal of the day" is not a joke.
Snack more, eat healthier. Going by a grazing method of eating works too, just don't eat copious amounts of junk food and avoid those cheese puffs. Go for a handful of almonds or pistachios, or grab a piece of ham in-between meals. Aim for a high protein intake for your diet.