This is one simple exercise that I learned from my former boss in the office. Do not use the elevator when going up to our office on the 4th floor and likewise in going down. That will give you more energy and taper your body of fats. Our house has a short stairs so what I do is to get the exercise in the office stairs. Sometimes I even climb up to the 5th floor and then go down 1 more floor as if I made a mistake but I was doing that deliberately for the exercise.