Essential oils smell great and they are delightful to use anywhere and anytime. They represent one of the greatest untapped resourses in the world. Essential oils can provide a system of medicine and skin care that is truly holistic, without polluting ouselves or the environment.
Following are few essential oils that would serve therapeutic and cosmetic purposes.

Essential oils for Oily skin
Cypress, geranium, grapefruit, juniper, lavander, tea tree, ylang ylang

Massage: 5ml of any water based massage cream add any of the following blends

2 Lavender, 2 tea tree, especially for acne
or
1 Yland Ylang, 1 orange, 1 geranium

Essential oil for Normal/ combination skin
Cypress, geranium, rosemary, tea tree

Massage: to 5ml of massage cream add
1 orange, 1 ylang ylang, 1 geranium
1 lavender, 1 grapefruit

Essential oils for sensetive skin:
chamomile, cypress, geranium, lavender, sandalwood

Massage: to 5ml massage cream non fragnant for sensitive skin

1 chamomile, 1 lavender, 1 sandal wood

The versatility and form of essential oils is very convenient. A few drops of tea tree oil over blemish will speed its healing. Applied over a burn it will relieve pain and the skin will return to normal in a few days, Adding a few drops to hot water for inhalation will provide excellent result for any respiratory tract infections.

Precautions
Do not use neat oils directly on the skin, always mix with base oil
Pregnancy- avoid all essential oils during the first three months and completely if there is a history of miscarriage.
Be extra careful dealing with sensitive skin