Here are a few tips, from someone who has lost a good amount of weight. I am NOT a doctor so please don’t take this as medical advice.
Tip 1: Get a fiber supplement and take it regularly. I usually like to start my day off with a protein shake (one made for body builders, that sort of thing), and a spoon full of that dissolving fiber. This curbs appetite tremendously. Obviously you don’t want to take too much fiber, but going slightly over the daily allowance is probably ok.
Tip 2: Cut out as many carbs as you can reasonably manage. Try to eat a lot of vegetables and lean proteins. Cutting out carbs is SO difficult, but it’s definitely worth it.
Tip 3: Exercise as regularly as possible, but don’t overdo it. It takes at least 3 weeks of regular exercise to get into the trend, and if you burn yourself out, pull a muscle, etc in the first 3 weeks, you’re going to get demotivated. Start out easy. A bike is a good choice, but personally I prefer elliptical machines. They are low impact and can burn a lot of calories. And of course, some minimal strength-training is good, but if you are going for “Maximum weight loss” you definitely don’t want to be gaining muscle. In fact, losing muscle will actually help you win the contest, even if it’s actually not so great for your health.
Tip 4: If you’re not hungry enough to eat an apple, you’re not hungry enough to eat. People claim they get cravings for a specific food, etc. But if you go to the kitchen to rummage for food and you see the bowl of apples, and it just doesn’t look appetizing to you, then you need to wait until you’re hungry enough to find those apples appetizing. If you don’t like apples, substitute with some other healthy food.
Tip 5: Try your best to eat only lean proteins. When I am trying to lose weight, I eat nothing but turkey, chicken and fish. Try not to eat fried foods. Steam and bake whenever possible. AVOID POTATOES, but sweet potatoes every once in a while are ok.
Tip 6: Reward yourself, but sparingly. It’s important, I think, to eat a nice treat every once in a while, but don’t pig out on a whole box of cookies either.
Tip 7: Find someone who will be your moral support. Ask a friend or a spouse to be MEAN to you and to motivate you. If you have someone who is constantly pestering you to work out and eat well, it’ll be a lot easier for you.
I hope this helps and good luck to you!