My mom and I actually went on a diet back in October, and I've lost 70 pounds myself (still got a bit to go, though). All we did was cut the carbs. We cut out bread, cereal, pasta... switched to lower carb versions of them (The bread and cereals we order online and the pasta we use is Dreamfields, which is a low carb pasta). Plus you just cut down on the size of your meals. Eat the suggested portions. Also cut out the processed foods and fast foods. Eat meat, real vegetables, fruits that aren't super high in the natural sugars. We drink almond milk instead of dairy milk. Any kind of snackage we have is sugar-free. If I drink soda, it's diet soda. But drink a ton of water. At least 64 ounces in a day is what's recommended. Eat lots of fish. If you need to get anything canned or jarred (we need spaghetti sauce after all), try to make sure it's no sugar added. They make tortillas that are carb-friendly as well, which is what I like to use in place of bread for sandwiches and such. You can still eat cheese, just as long as it's not the processed stuff. I usually go with a nice sharp cheddar. We do eat and drink Atkins products. Their chocolate shake is to die for and it gets me through the morning, because it has a lot of fiber and protein, which is what makes you feel fuller without eating so much. Exercising is definitely a big part of it, though. We joined a gym.. as around here in the winter it's too cold to do anything outside (though that won't be a problem soon). Maybe you should try that. It's always fun to watch tv while walking on a treadmill or being on the elliptical. An hour, at least, for every trip and for a couple days a week. Then work your way up to every day. I know you're only trying to lose a little bit weight, but cutting carbs can make a big difference, and then you can just keep yourself balanced between going low carb/no carb, and exercising and once in a while having those guilty pleasures we all have (I have mine when my parents aren't home >.>).
And what kept me motivated was seeing the dramatic loss of weight in the beginning of the process. Now it's just second nature that we eat like this and keep all the bad stuff cut out. My weight as sort of plateued out, but things have gotten a bit stressful with everything that's been going on. I just eat the part. I haven't worked out in a while. Maybe when this whole moving this is done.