When I go shopping I always buy: eggs, bacon, cheese, meat from the deli, H2O, and lettuce for salad. You have to watch some of the meat from the deli because it can have hidden carbs.
I buy oscar meyer cheese hotdogs. I try to buy a variety of meat like hamburgers, chicken and steak. I eat a lot of shrimp too, but that depends on your budget. I like to keep some beef sticks in the frig too either for a snack or a quick lunch. Prok Rinds are a good thing to have for a snack. If I think of anything else, I'll let you know. Good Luck, at first it takes a lot of time to do your shopping because you're always reading lables, but it gets easier.