to the Atkins website that talks about the order to add more carbs:
Carbohydrate Ladder

I must admit that I passed right by the first 2 categories & have added berries & nuts since I've been off Induction. It very well could have slowed my loss but to me it was worth it to eat those luscious strawberries a couple times a week.

If you want to be careful about adding the carbs in, you should read the section on OWL (ongoing weight loss) because he does have rules to follow. Here's the link to the rules & there are other articles you can get to from this page:
Rules of OWL

Hope this helps & good luck!!