Combine all of the seasonings together and store in a closed container for up to a year. Storing them longer however does affect the potency of the seasoning.
Notes
You have two choices when making this, you can put it all in a food processor and grind it up until it's more powdery, or you can use it as-is. I don't mind rosemary being larger in my seasonings, but you can grind it all up if you prefer!