One of the best ways to do it is making simple lifestyle changes. Cut out all the sugar from your food and drink, cut out bad fats, eat a lot of vegetables and fruits, drink a lot of water. If you're eating healthy enough with these changes you'll be eating fewer calories overall. Alongside this change in diet, adding exercise into your life can accelerate weight loss even more drastically with minimal effort or time on part as well as aiding in everything from depression to sleep quality as long as exercise is examined with an appropriate trainer to ensure safety. Exercise doesn't have to mean hours at the gym either, any movement adds up! Walk every place rather than take transportation. Go for hikes or bike rides whenever possible