Drink hot water with lemon.
Eat hot meals rather than cold. Your metabolism speeds up very slightly when you eat and again if the food is hot.
Do at least thirty minutes of cardiovascular exercise, five days a week. This will condition you to burn fat more efficiently.
Don’t deprive your body of carbohydrates, no matter what they say. You need carbs for energy and will feel terrible without them.
Wear a pedometer and see that you take 10,000 steps every day.
If you have a sit-down job, get up every hour and walk around for five minutes or so.
Dedicate two hours a week to weight training, concentrating on the larger muscles. Every other day is optimal.
Have 5 small meals each day, instead of 2 or 3 meals. This keeps your metabolism firing (and tells your body it doesn’t need to store fat for the next 12 hour drought).