One of my favorite ways to burn calories and burn fat is called HIIT (High Intensity Interval Training).
It's exactly how it sounds, INTENSE!! And it's a LOT of work, but can also be done very quickly. The below chart is just a 15 minute workout, but 15 minutes of HIIT can burn you around 180-330 calories (depends on weight, gender, intensity you work, etc). So yes 15 minutes a day can ultimately burn you 200 calories!!! Double it and you're doing great! I know people who can burn 500 calories in 30 minutes!! It's an INTENSE workout, you WILL be sweating after, but it's AMAZING for you and is a relatively short workout.
For reference, I run for around 30 minutes and I burn about 120 calories. With this you can burn TRIPLE that in the same time!
I've been using a combo of these exercises for about 3 weeks now (3 times a week) and have lost 4 pounds! This is awesome and a great way to burn off those after Holiday pounds.