Originally Posted by rockzilla

Just keep plugging away in the gym. You're not going to be able to grate cheese on your abs after just one week.
At least half of your progress will be made in the kitchen with your diet. Make sure you get a lot of protein, about 1 to 1.5 grams of protein per pound of body weight per day, try to keep your fat intake around 20% of your total calories per day.
Try doing crunches on an excercise ball (or a Swiss ball, as they're sometimes called). It's harder to keep your balance on it, which brings a lot of your smaller stabilizer muscles into the motion. You can also do your crunches while holding a weight plate to your chest or behind your head to add to the resistance. Just keep working away and you'll have a six-pack before you know it.