Alright, I know some of these titles are getting kind of lame. I just can't help it.
Back to the point, Trader Joe's is a great place to go grocery shopping. I think of it like Whole Foods goes cheaper. I like to go there, but usually find that I need to go to Safeway to pick up the rest of the supplies for the week. My favorite buys there are Cliff and Luna bars (which are usually about a buck each), their premade salads which are great for taking to lunch (the Chinese chicken is a fav) and Trader Ming Soyaki (sounds stupid but is REALLY good--try mixing it into a turkey burger, and you almost forget you're eating just turkey).
There is a small parking lot attached to the one in the U-district. Sometimes it gets pretty busy, and you made need to wait, but at least its available.