Hi Becky,
I don't think there is any real way to avoid loose skin if you lose lots of weight (especially in a short time) I suppose the condition of your skin and the length of time it has been stretched by extra weight must count towards the end result?
I lost 17st 10lbs on lighterlife, I looked fine dressed - but undressed I looked like I was still wearing a dress!! the skin really upset me and I was taking steps towards surgical removal when I started to gain weight again. I'm having a bypass soon and know that I'd accept the loose skin for feeling happy and healthy again in the blink of an eye.
I know that wont be much help to you, but there are removal options if it is bad, and there will be so many other plus points after the operation. You might be lucky and hardly have a problem at all xx
Until then .... moisturise, moisturise, moisturise!