Hi Merry -
I use one from Young Living called Peace & Calming most of the time, or a respiratory one I make up from several oils if I am going to wear it all day (contains lemon, camphor, eucalyptus & peppermint.) I find lavender by itself boring after a while.

I'm a huge fan of essential oils - have blends I use for everything - put them in labeled roller bottles, don't know if they really do anything therapeutic, but they make me feel better!
Sue