Best supplements to use?

I am naturally a "small" person but in the past year and a half I have started to gain weight and fat with a lack of diet and exercise since being in college and not in extra activities. I was wondering if there are any professionals (doctors/fitness instructors) that could suggest the best supplements in conjunction with a healthy diet and regular exercise routine to aid in some fat/weight loss, maybe a dietary suppressant that works best or extra energy boost. I have tried some supplements (like the green tea) and I find most things that people swear on only work well for people who are really overweight. I only need to lose around 10 pounds and want an effective supplement aid to add to my diet that can help even when you are not heavily overweight or obese.