I lost ten pounds in just over a month just by tracking my calories on Spark People and staying within the designated range they gave me, which is 1200-1550 calories per day and eating a balance of protein, carbs, and fats (mostly healthy fats like nuts, avocados, and olive oil). Try to make most of your carbs the complex ones - whole grains like wheat bread, oats, brown rice, whole wheat pasta, etc, and fruit and veggies. They keep you full much longer than white bread and regular pasta. Try to keep your proteins the lean ones like chicken or turkey breast, fish, shrimp, and lean pork and beef. Drink lots of water and cut back on alcohol. Don't do too much exercise to start with or you will burn out with too many changes at once. I focused on my diet for a while and staying within my calorie ranges just to get my diet under control, now I have added in walking for 30 minutes to an hour each day and doing a 20 minute circuit training video two or three times per week. I ride my bike sometimes. Since you are a mom, if you take your kid to the park, try to be more physical about it - like pushing the merry go round and climbing around with him or her. That counts as exercise and is great for both you and your child! I agree that it's good to find exercise you can live with. For me, that's walking outside or riding my bike, but for you that could be rollerblading or swimming, or whatever you find that is fun and doesn't feel like too much of a chore. Just don't cut your calories too low (below 1200 per day is definitely bad, and you may need more than that depending on your size and current level of activity - using Spark People or some other site to help you calculate what range you should be in to lose weight without starving is very useful). For me, times when I tried to take on too many drastic changes at once really caused me to burn out rather than stick with it. And the good thing about the calorie counting is that it helps you control your portions and you can still have the things you love in moderation, like chocolate, wine, french fries and pizza. It's unrealistic to think you will never eat those things again, so I think it's important to just learn how to incorporate them into your otherwise healthy diet without going overboard. Get a good set of measuring cups and spoons and a scale for the kitchen and start weighing out portions for yourself.
For lunch, try making a whole wheat pasta salad or roasted vegetable cous cous and then you can portion it into containers to take to work with you (and include a piece of fruit or some popcorn or something for a snack). I love tuna and cucumber wraps - half a tin of tuna, one tablespoon of light mayo, and half a cup of peeled and chopped cucumber wrapped in a whole wheat tortilla with some lettuce or salad leaves. I have this with an apple and it keeps me full until dinner time. Getting a lot of fiber and drinking a lot of water are the two best things to keep you from starving while you cut back your calories.