First and foremost, don't obsess over weight loss. Doing so will only serve to make you impatient, ultimately resulting in failure. Take it one day at a time.
Walk every day. If an hour-long walk seems too daunting, break it down into smaller sessions. Three twenty-minute walks are no less effective. For me, it helps to think of exercise in a contiguous manner. For example, you can think of your day's exercise as starting from scratch, or as I prefer it, you can think of it as continuing your mileage from days past.
Do not engage in distracted eating. In other words, if you're eating, then that's all you should really be doing. It's fine to socialize with family at the dinner table, but watching TV, for example, is a major pitfall that most often leads to mindless eating.
Cut liquid calories. Drink soda? Save it for special occasions. Juice should only be consumed in moderation. For the most part, you should be drinking water.
Chew your food slowly and drink water in between bites. You'll feel full faster.
Don't serve yourself at the table. Fill a plate at the counter and save the leftovers for later. If you still feel tempted to grab more, just keep in mind that each successive serving of food is going to taste less satisfying than the last.
Use smaller plates. Doing so will prevent your eyes from dictating your appetite.
Don't stay up too late. Sleep well.
Finally, it is imperative that you measure out your servings. A food scale is very helpful to this end.
Edit: You need to figure out how many calories you burn in a day. Depending on your current weight, you may be able to lose up to two pounds a week. In order to meet such a weekly weight loss goal, it would be necessary for you to cut 1000 calories out of your diet. If that amount is too high for you given your current weight (message me and I can find an estimate for you), then cutting 500 calories would yield a loss of one pound a week and so on and so forth.