Cardio Burn

Start slow and pace your transition.
There is a great possibility that you will not be able to complete a cardio workout plan if you start with drastic cardio training.

Try Beating your Timings on the Rowing Machine
Push yourself to better your own timings while exercising on the rowing machine. If you do one interval of 100 meters, note the time taken to complete.

Consider Adding Strength Training to Your Treadmill Workout
It would be a great idea to pick up some weights while running or walking on the Treadmill. You can do this by picking up some dumbbells. The weights could be anything as per your choice.

Eat a proper pre-workout meal
Nutrition is very important for exercising. Proper nutrition allows you to exercise longer, delays fatigue, helps your body recover quicker, and helps prevent injury and illness. What you eat before during and after exercise is very important.