Making a quick trip to the store...

Staples:
Brown rice
dried beans
fresh veggies/mushrooms
almond milk (the dark chocolate is off the chain)
bananas
lemons
raw almonds
frozen berries (for smoothies)
(just a partial list, of course. Off the top of my head)

Snacks:
I don't buy processed snacks, I make all my own or snack on fruit, nuts, raw veggies, etc.

frozen chicken breasts,
canned black beans,
carrots,
trader's joe's pizza dough (assuming I'm going there)
almonds,
canned low sodium diced tomatoes
frozen veggies (all kinds, green beans, pepper strips, corn,
potatoes
onions
garlic.

boneless skinless chicken breast
Canned beans
any sale fruit and veggies
sweet potatoes (just put them right in the oven on the rack and bake until skin pulls loose and it is softer)
greek yogurt
raw nuts
frozen blueberries
salmon
pacific cod

What do you eat the black beans with? Or just plain?

Depends. Last night I had them with burritos. Sometimes I'll just sautee them with onions, peppers, and shredded carrots. With the right seasonings and bit of hot sauce it's darn tasty and very filing.

EDIT: and chilli of course.

beans, yogurt, nuts, peanut butter, lots of veggies, fruit, hummus, tons of fish and seafood, ground skinless turkey, organic chicken, organic eggs, organic decaf tea, chicken broth, quinoa, soups and whole wheat stuff. Cheese, but as a condiment not as a protein.