I didn't put on loads of weight either but put on probably about a stone of excess. I was determined not to put too much on because I didn't want the headache of trying to lose it all. I also found I wanted to eat healthily anyway.
It took me 6 months to get back to pre pregnancy size but most of the weight fell off in the first 3 - 4 months and then there was some stubborn stuff.
I found that eating a sensible, well balanced diet with good exercise is what did it for me. I have always found it's really important to have a healthy 'lifestyle' rather than a diet which is often really difficult to maintain because eventually you want to enjoy things you used to like to eat and it's impossible to diet for the rest of your life. I spent years doing this when I was younger and have no cracked a great lifestyle that is easy to maintain.
I eat plenty of fish, chicken vegetables and fruit, pasta and rice and really enjoy eating freshly prepared foods. It's still easy to cook even with a baby I find if I'm organised and cook healthy but quick food.
I don't eat much red meat because it's high in fat and difficult to digest, however do eat some, say once or twice a month.
I find it's most important to eat well during the morning when im hungriest and not eat too late at night. Missing breakfast is not an option because if you do this your body goes into starvation mode and then stores everything you eat after that as fat for energy. This is a classic dieting mistake I used to make. I eat a good breakfast now and I lose weight rather than put it on.
I try not to eat too much high fat food like cheese (although I love this), or high sugar foods like sweets or biscuits but it's important not to totally deprive myself otherwise I feel unhappy and I can't sustain it so everything in moderation, I buy yoghurts for deserts and still eat some fatty foods like crisps but only when we are entertaining or I am going out etc, I don't buy them.
Another thing I have found very successful is cutting down on the amount of carbohydrate I eat with an evening meal. Therefore I tend to fill up on veges and protein and keep the carbs low at night.
The other really important thing is exercise. This is key, I try and go 3 times a week although sometimes its really hard to find the time and / or motivate myself I feel great after.
BTW, I never cut down on the wine ! A girls got to have some pleasures and I think it aids digestion