Oregano
Just add oregano for instant pizza flavor. It appears in ground form or as dried whole leaves. The ground version can be pretty potent, so add it cautiously lest you overwhelm every other flavor.

Paprika
It puts the "Paprikash" in "Chicken Paprikash"? And though it's made of ground-dried peppers, this is not the fiery pepper of, say, cayenne. Expect a dark, smoky flavor that matches well with meats.

Parsley
Mainly used for garnish and color, our little green friend also supplies a subtle, grassy flavor. Use fresh parsley to wake up the dull colors of macaroni salad; sprinkle dried flakes on your mashed potatoes.

Pepper
A perennial favorite for adding a kick. To keep your kick a-kicking, buy your pepper in whole corns and grind as needed. Black pepper is good all-purpose stuff; if you feel fancy, add white pepper to your collection as well. It's got a cleaner, brighter flavor than its dark cousin.