Hi,
Hope what ever you try works for you.
this is only a tip. Ensure that you eat a healthy breakfast, maybe a bowl of speacial K a smoothie or a peice of fruit. Then have a salad for lunch and then a healthy dinner like a JP or something. Exercise wise. Try cycling for 30/40 minutes per day.this burns over 200 cal If possible try to go on a running machine, doing the gradiant levels or even just a power walk and then maybe finish it of with some sit ups.this will work your tummy musles but the running machine will also burn the calories. there are a few good DVD workouts out there at the moment. how about getting one of those and doing it before dinner?i have the zoe luckers little black dress workout, i love it, the boxercise is fab and then there is a yoga part at the end to winde down. i would imagine that the swopping full fat drinks for low fat has been heard and done before. try those though they have worked for me in the past.