No matter what hair type you have, one thing remains the same for all ... Healthy scalp = Healthy hair.  I suggest using these in addition to your regular pre-poo or with your deep conditioner.

Normal Scalp:
1/2 tbs of rose water (has antiseptic and anti-bacterial properties)
1/2 tbs of mineral water (helps to stimulate hair growth)
1 tbs of your favorite oil

Oily Scalp:

Oily scalp types are often associated with oily skin types.  With oily hair, the scalp produces too much oil, which can attract dirt, resulting in a greasy hard to manage appearance.
3 ounces of  witch hazel (astringent)
3 ounces of mineral water
Pulp of 1 lemon (natural conditioner and imparts a natural shine to hair)

Dry, Tight Scalp:

Dry hair lacks the oils need to keep the hair shaft and scalp properly moisturized.  This scalp type needs plenty of nourishmment to function properly.  Most naturals have this hair and scalp type.
2 ounces of  warm olive oil (moisturizes and softens the hair)
1 teaspoon of wheat germ oil ( high content of tocopherols (Vitamin E)
1/2 teaspoon of rosemary oil (helps grow hair faster & is good good for knocking out dandruff)
3 drops of  lavender oil (has antiseptic & anti-fungal properties)

Section hair in 1-inch widths and dampen the scalp at each parting with a saturated cotton ball (or you can just use your fingertips).  Re-wet your fingers in the solution as necessary.

Here are some of the products listed above....

And here are some links to find the others....

Heritage Rosewater : http://www.vitacost.com/Heritage-Products-Rose-Petals-Rosewater?csrc=YSHP-076970446094

NSI 100% Pure Lavender Oil : http://www.vitacost.com/NSI-100-Pure-Lavender-Oil

Wheat Germ Oil : http://www.ihealthtree.com/wheat-germ-oil-8oz-spectrum-essentials.html

All other products mentioned can be found at your local grocery store.