Foot Reflexology: massage the part of your foot corresponding to the part of your body hurting & it will slowly reduce pain. (promotes blood circulation to that part of the body-Learned this in cosmetology school,Helps get rid of headaches& cramps )
You can make a simple car diffuser from just a clothespin, hot glue and felted balls. Glue the balls onto your clothespin. Whenever your car smells musty, drip a drop or two of essential oils onto the balls and then clip it over your air vent.