Lavender is very helpful for me. You can put a drop or two on your wrists to inhale, or you can also diffuse it (you can find diffusers pretty cheaply and all they require is water and a few drops of essential oil). YoungLiving also has a blend called "Peace and Calming" which is very relaxing. Oils are also effective to put on your feet as the bottoms of your feet relate to certain "zones" of your body - sounds weird, I know, but I swear it works for me!