With any sort of weight loss plan, you need to make it into a lifestyle. You can't just quick fix weight loss, it just doesn't work, especially with low carb. Low carb is a lifestyle. I would definitely get into the habit of being conscious about your intake still, even if you're at goal, and make exercise a part of your lifestyle. Figure out your carb level and give yourself a five pound window (I'm going by the Atkins and every other diet plan I know of). Monitor your stats on a weekly basis. If you lose track of it, you might lose it completely. That's when the weight starts creeping back.