Train with weights

When you train with weights, two things happen: firstly, subjecting a muscle to positive stress through exercise stimulates growth of new muscle tissue. Secondly, this new muscle growth will result in your body burning more energy which means you burn more calories. The body will burn additional energy to maintain the muscle tissue that is being regularly subjected to muscular stress.

Ensure that you start with compound exercises - During the first several months of your muscle-building routine, concentrate on performing compound exercises such as bench presses, squats and deadlifts. These exercises will strengthen muscle groups and prepare you for more refined exercises later on. You can find some great routines here 

Do cardiovascular exercise at least twice a week

Low to moderate intensity cardiovascular exercise plays an important role in any fat loss program. Of primary importance, low intensity cardiovascular exercise stimulates the release of fatty acids from tissue. This has two benefits: Firstly, you're actually burning fat, secondly, your body will up-regulate the enzyme systems necessary for burning fat more efficiently. So you’re burning more fat and you’re burning it faster.

The second reason why you should perform regular cardio work is that it helps protect your heart. Good cardiovascular health is vitally important to your long term condition and longevity. Take care of your heart and it will take care of you.