I love TJ's. Sadly the closest one is over a 5 hour drive. When we get to one we stock up!
They have great gourmet cheese at a great price! I found one I really liked at Whole Foods and it was substantially cheaper at TJ's.
They have lots of great frozen items. The potstickers are good. My favorite is the chicken Chili Lime burgers. So good! I'll grill one up on my George foreman and bring it to work for lunch.
My other favorite is their Harvest Grains. It's a mix of Israeli couscous, red quinoa, mini chickpeas and others. It is such a great rice stand in. I actually prefer it over rice in most dishes. I buy many, many bags of this. Unfortunely I'm out right now.
There are just so many great specialty items. Just experiment and see what you like. Don't be afraid to try different things.