BOY OH BOY! I do have a few!

-Epson or mint salt baths
-Taking 15 minute breaks throughout a work day helps a lot in the long run
-Cold gel packs or hot water bottles. Never apply directly to your skin, but wrapped in a sweater or a blanket works wonders. I've been told that using both is good for your muscles.
-Stretching often while you're working also wakes you up!
-Man-servant rub-downs with Tiger Balm

Take care of your arm!