Sorry to contradict you, Haunted, but I'm going to disagree with your recommendation to stay off carbohydrates. Carbohydrates are the best way to give your body energy. Currently, the average North American gets ~50% of their energy from Carbs, though Nutritional Biochemists are recommending that that number be increased to ~60%. That is, replace fat in the diet with Carbohydrates. Within that, most of the energy from Carbs comes from starches and fibre, which ARE NOT the same as plain sugar. Yes, your carbs are broken down into sugars, but those sugars are necessary for your body to function properly. Excessive Carbs will make you gain weight, but avoiding them altogether is not a healthy way to diet.
Fat can be bad for cholesterol because it is the major source of cholesterol in the human diet (cholesterol only comes from foods of animal origin). Again, this problem is often caused by excessive consumption of eggs and meat.
Fruits and vegetables are definitely a good idea, though fruits are a huge source of sugar. Vegetables (especially dark green ones) are a good source of vitamins, but don't provide you with any energy.
Basically, what I'm saying is that everything in excess will cause you problems. Your body needs fat, protein, and carbohydrates, as well as other things of course. Balanced meals are the best way to go. And exercise of course.
Sorry for the rant, since Niamh already said she eats well haha.
Oh, and Niamh, I was having the same problem you were before- no matter what exercises you do, it doesn't feel like you're working your lower abs? I asked a personal trainer about it once and she told me that no exercise will work on lower abs until you've strengthened your upper abs. She said that with abs, you have to work downwards. She recommended this exercise for the uppers:
http://www.sixpacknow.com/preview3.html
Stupid website, but scroll down to the Curl Up. That was it, though I was told to extend my arms forward. It was working until I got lazy
After that, I was told to go on to some of the other exercises mentioned in other posts.