What precautions should i take to avoid wrinkles?

A lot of options: You can first try staying out of the sun as often as possible, always wear sunscreen, don't smoke, get a good amount of sleep, sleep on your back, try not to squint, if you need reading glasses get some, don't over-wash your face, use a moisturizer, lay off the coffee and try cocoa instead, and eat healthier foods. I hope this helped :].

Avoid the sun: Few things age skin as much as ultrviolet light(sun, tanning beds).Using a good sun block is the best and simplest way to minimize aging of the skin.

Prevention: Keep healthy, active, hydrated, use moisturizers, avoid smoking and excess sun exposure.