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Well when i was young I did 5 min jogging on the spot, 5 min star jumps, 5 min of crunches, 5 min of marching on the spot, at least 10 push-ups, now i dont know what this is called but you stand straight with your arms straight out beside, spin them in a small circle, you will start to some pain in your arm, that means it is working, if you have a treadmill walk on it for 30 min, for a challenge dont even turn the treadmill on, try and make the base move by you walking on it, also grap a step or small stool or something like that so you step up and down and that over again for at least 10 min. stand straight and twist your upper body (not sure what it is called).

I hope this helps! Good luck and make sure you do this daily, or you wont see a difference!

anyway , 20 kg in 3 months may be too much and ur body may not be able to take it . but if u want to lose weight healthy , u might want to try some pilates exercises . u can find them at http://m.youtube.com/watch?v=lCg_gh_fppI . if npt u can find some really awesome exercises at http://www.womenshealthmag.com/ they have really great ab workouts

enjoy sweet ice cream but go for ones made out of goat s milk or almond milk for half the calories

do the wii fit, go for a walk daily, go to a gym, even walk up the stairs a few times.

Try running and drinking water.

drink plenty of water

put most used items on top or bottom shelves so you have to reach for them

get moving