This is a chance for me to see if my education is paying off! I just graduated with a degree in a dietetics.
10 lbs is not a lot to lose, so I would encourage you to lose it very slowly (no more than 1/2 - 1lb per week). In order to lose up to 1lb per week, you would somewhere cut 500 calories per day. This can be done through less calorie intake or increased exercise. Because you have such a small goal and are not overweight, I would suggest cutting about 250 calories per day, through both diet and exercise. A combination of both weight bearing and cardio exercises are best. If you chose to do weights, your body will initially hold a little extra water in the muscles, so don't be surprised if the first couple weeks the scale *says* you gained a pound or two. It is simply part of the muscle healing process! You aren't actually gaining any weight, as it is simply a little extra water. Also keep yourself very hydrated! Powerade Zero is a no calorie/no CHO drink you can use to hydrate yourself--it also contains the necessary electrolytes if you sweat them all out!
Try consuming more nutrient dense foods. Increase fruits and veggies and whole grains. These have lots of protein, fiber, and good fats in them which help keep you healthy and comfortably full. DON'T tell yourself "I cannot eat this food because it is bad for me." There are NO bad foods. Simply monitor how much of it you are consuming in a day.
Before you actually begin losing weight, I would keep a food diary for 3-4 days. Don't change your eating habits for these. You want an accurate count of how many calories you are currently consuming. In the diary, keep track of the specific food (brands may be helpful) as well as amounts. Your fist is approximately one cup. A deck of cards is 3-4 oz. 2 dice are 1 ounce. Those are some simple comparative measures you can use. If you aren't sure how to count calories for some items, you can put your food diary into http://www.mypyramid.gov or http://www.fitday.com and they will give you an approximate number, as well as food groups consumed.
CHECK YOUR BLOOD SUGARS OFTEN WHEN YOU ARE FIRST STARTING A NEW DIET/EXERCISE REGIMEN! Your blood sugars will more than likely be on the low side at first. But after you have seen how they respond, you can accurately adjust your insulin to compensate. Instead of only eating 3 large meals a day, consume 5-6 little meals and include snacks. This will keep you from feeling incredibly hungry throughout the day and then you won't overindulge when you do eat. Also, 15 mins before you exercise eat a small snack--something with a complex CHO and protein to help boost your energy and blood sugars a bit. I would check your blood sugars before and after exercise, and consider eating another snack 30 mins after you exercise if you feel you need it. In case you experience low blood sugars, keep snacks and supplies with you everywhere (even gatorade works!).
Even though you want to lose 10lbs, I encourage you to not use a scale. This of course if up to you. These days, we are turning less to numbers and "should be" weights, and more to how you feel, how your clothes fit. It's about feeling good about yourself, not reaching some ridiculous number on a scale!
Yay for really long posts! Sorry about that. Hope this helps! Once I finish an internship, I will "officially" be a dietitian. Right now I'm qualified as a nutritionist/nutrition eductor & counselor. Let me know if I can help you in any other way!