Hmm... I spend the most money on food, I suppose. My husband and I are strict vegetarians, and the soy meat costs quite a bit. We do our shopping at Central Market, which is a small "gourmet" spin off of HEB. But the produce is awesome and they have Veat.
I'm pretty thrifty with books, I suppose. We buy quite a few of them, but always used on half.com.
Oh, and I almost NEVER buy full priced clothing. I just wait until it's on sale.