My top three would have to be:
1. GG Bran Crispbread (Keep these in my purse as well, and they go great with everything: cheese dip, guacamole, cream cheese, etc...)
2. Low carb tortillas (keep in my purse to have on hand for eating out). I have found, though, that I'd rather just dump out the stuff from other sandwiches, tortillas, hamburgers, etc... and eat them with a fork. I only occasionally feel like I "NEED" the wrap. I use them at home for cheese quesadillas.
3. I keep eggs on hand ALL the time now. They are used in lots of baking, quick protein meal, etc... I didn't really care for them before.
My latest "MUST HAVES" include my latest craving for cabbage and also for cream cheese/celery. It's weird, but I have craved it for a month. So, I have been keeping stocked up on these items lately.