Tonsillectomy and weight loss?

I've just recently had a tonsillectomy and during the recovery process lost a bit of weight, about 10 lbs. Basically, this is because I've survived off a liquid diet with maybe a little bit of ice cream and mac and cheese if I can get it down. Now that the weight is lost and I will be returning to my regular diet soon, I was wondering if there is a way to keep that weight off?

Thanks in advance :)