Can you walk fast? Can you spare 45 minutes a day?
Walking Calories Calculator by Pace and Distance
A good-paced 45 minute walk every day burns 350 calories, means you lose 2450 calories per week.
Drop your food intake by just 150 calories per day - thats another 1050 per week.
Keep that up and you'll lose at least a pound per week (it's 3500 calories per pound of wieght, approx)
Do some resistance exercise at home - lift light weights, do 30-50 sit-ups, press-ups every day and you'll lose another 1lb a week.
Six weeks = 12lbs lost!
PS Get an ipod, radio etc to walk with, really helps!