Catnip for Cat Sitting jobs? Sure! I bring a little of the good stuff with me when I first start a cat sitting job.
Cats can be pretty finicky when their owners go out of town. They don't want to see anyone, they are lonely, they are a little snitty. So, I bring catnip and dig around for an old ratty washcloth or clean rag. I'll put a little bit of catnip on the cloth (about 1/2 teaspoon) and rub it around to break up the leaves and get it aromatic. I'll then give the cloth to the cat.
They go nuts!
My favorite catnip is Cosmic Catnip. It comes in a plastic tub and stays fresh to the very bottom of the tub. Much better than the stuff at the local store in a plastic bag!