Trader Joe's is the ultimate place to buy delicious, healthful, and sometimes organic foods. If you are someone who doesn't like cooking but also doesn't like eating out all the time, you gotta go to TJs. The frozen pizzas are great, the hummus is delicious (excluding the spicy pepper) and they have awesome naan. Besides frozen foods, there are a lot of cold prepared meals that are easy to heat up.
On the down side, their produce is mostly pre-packed and can tend to be overpriced, although there are still some bargains.
The wine department is great for any time you are looking for a fun bottle under $10 to try. They are always changing selections and the staff is generally quite knowledgeable.
I also love that I can randomly grab beautiful flowers on my way out the door...and the flowers are always something interesting and exciting.