Lavendar is okay when you are up since it is used as a calming aid. You would have to experiement with it to find his “optimum dose” – usually 1-3 drops is enough, but you play with it until you know how it works best for each person. In reality, lavendar has over 200 components in that are used for many, many different things from pain, bites, relaxation, etc. Lavendar is called the “Swiss Army Knife of Essential Oils”.
Carrier oils can and should be used for essential oils. There are “hot” oils like oregano that must be used with a carrier and others that are more cooling, like peppermint that can be used neat (undiluted) depending on where/how you use it. Children, pregnant women, and people with sensitive skin generally use more carrier oil than others. The carrier oil I use is called “Defractionated Coconut Oil” which doesn’t stain our clothing. However, a carrier oil can be any oil you have like olive or canola or vegetable – those will stain, so watch out for those. 😉
For those with Young Living Oils, my sister uses this book:
http://www.amazon.com/Quick-Reference-Guide-Essential-Oils/dp/1937702014/ref=sr_1_1?s=books&ie=UTF8&qid=1359151450&sr=1-1&keywords=reference+guide+for+essential+oils+book
I have this book written for the doTerra Oils by this company: https://www.aromatools.com/Modern_Essentials_Fourth_Edition_2012_p/1151.htm
I use it alot. There is a place that explains the science of the oils, then lists the individual oils and their uses and components, then their oil blends and spa products, vitamin packs, then comes my favorite part – pages and pages of diagnosis and the oils that help with them and how to use the oils effectively. At the bottom of each page is the list of tests explaining/proving the uses listed, AND there is a page that explains which oils can be used neat and which needs to be diluted.
I do not have a list of library books for you to get since that book does all of that for me, although I do want to read and learn more.
Several people sell – sigkapoli in her earlier post mentioned that she does. I have only sold to my family since I don’t have a lot of time to devote to it. I can give you more information about that if you want to PM me for more specifics. I don’t want to abuse the forum with that part of the stuff. 😉