How can I lose around 5-10 pounds?

I'm fourteen and I've always been chubby. I really want to lose the access fat on my stomach, other then a little on my thighs and upper arms I don't have any other problems. I don't eat that much but all the women in my family tend to be on the chubby side(not fat.) If you could give me some tips on what food to stay away from and what exercises I could try I would greatly appreciate it.