Rule of thumb: when in doubt use lavender. Lavender is a very versatile oil, and most people, when they get started with oils have some experience with lavender. But I immediately noticed a difference. Growing up my mom would always have lavender scented hand soaps and lotions but when I opened my bottle of lavender it was like I was smelling it for the first time.
SLEEP- One of the first things you'll want to do with your kit is take out the lavender, and add a few drops to your diffuser when you go to bed at night.
RELAXATION- You might also consider lavender with some epsom salts for a calming bath.
SKIN- Lavender is also extremely soothing for your skin.