drink water
Drinking water is essential to hydration everyday, especially after tanning.
Try to drink eight 8-oz glasses a day.

avoid tobacco products and excess alcohol
Obviously, Tobacco and Alcohol are drying to the body and the skin. Any substance that contributes to dehydration of the body will be detrimental to the skin and lead to premature aging.

limit tanning to 3-4 times a week
To determine how often you should tan (recommended exposure schedule), always take into account your skin type and your tanning goals. Remember, as with most things in life, moderation is the key to healthy use of UV.

use shower gels
Regular use of harsh soaps can shorten your tan's life. The essential oils in your skin form a moisture-lock, and when these oils are depleted they leave tanned skin cells more vulnerable to being lightened or washed away. Shower gels with less alkaline pH levels are not as likely to completely strip your natural oils.