Rosemary is a very tasty a good spice, that can be used in a lot of receipes. I've got a beautiful plant in my garden, so generally I use it fresh, but it can be conserved.
Gather some rosemary branch, wash it and let it dry for some hours.
Tear off the leaves. You can do this easly just pulling from the last leaves to the root of the branch in one smooth move.
Using a mixer, chop up the rosmary. Do not pulverize it.
You can add salt, but rosemary is healthier without salt ;)
Let it dry again, for a day or two.
Put it in a jar and it's done!
This is a convenient way to conserve and use rosemary.
Use it in a lot of receipe! For example in tomato sauce, to make it tasty with less salt, or in the soups.