I second the comments about Penzey’s and the Sriracha hot sauce. Also, I grow gobs of fresh basil every summer and couldn’t do without it.
I like to shop at Asian and Middle Eastern markets for both quality and bargains.
At Asian markets, I find:
Very fresh, whole-body fish. I just bought a fat Japanese tai (red snapper) for $5, which I grilled in our fish basket on the barbecue last night, stuffed with rosemary, garlic and parsley. Superb!
Top-notch baby bok choi, fresh water chestnuts, fresh bamboo shoot, and pineapples as ripe as I found them in Hawaii.
At Middle Eastern markets, I find:
Greek olive oil at 1/8 what supermarkets charge for that overblown Tuscan stuff, and superior to boot.
Greek-style yogurt, which is thick and dense and delicious.
Feta, pistachios, baklava, pitas, Armenian cucumbers, mint, lemons and sumac.
Do some research about your local ethnic markets, shop there, and “secret” ingredients will leap off the shelves and into your shopping cart. You’ll save money and it will be fun, too.