first, figure out exactly HOW much you would want to weigh.
second, commit to a certain amount of time you will realistically give to exercise weekly.
once you know your weight goal, it is a lot easier to stay motivated and also know how much you need to eat. there are plenty of "weight loss calculators" online. I'd guess 2000 cals but I'm not a doc
fiber and water are HUGE in weight loss (and I'll spare the scientific reasons) drink 2-3 Liters a day of water and become a fan of bran.
cardio is good, but strength training is a little bit better. What I do is lifting Mon, Wed, Fri, and cardio tues and thurs. make sure you do high reps and low weights (say 10-15 reps, 3 sets) one great fat burner is take a barbell of weight that you can only press over your head 15 times, standing up, press over your head and then do a squat...15 times. Then do 15 lunges with the same barbell, then 15 bench presses with a heavier weight (your chest is stronger), then 15 dips (triceps are the majority of arms), then 15 curls. repeat all 3 times. as you get stronger, do it 4 times, then 5, and then add more weight when you get there. FINISH with 20 minute jog or bike (very important)
Tuesday and Thursday do 30-60 min of jogging or biking, do your abs these days as well (reverse crunches, the 'bicycle" and make sure you get your heartrate up.
Most importantly, eat 6 meals a day (small meals)
it works, I've lost 60lbs doing this and have sooooooooooo much more energy.
also, this is a great FREE website with tons of tips
link