Stretching is a simple high-intensity workout which is effective on the whole body. There are many such moves that help to build strength and boost the metabolism of your body. You can practice these workouts anywhere and there is no excuse to skip these workouts. What you need to do is give workout challenges to test your body limits so that you could reach your fitness goals.
Here is an infographic on some fat burning bodyweight workout by Greatist. So here you go: