The best way to treat most things is to prevent them from happening in the first place.  Wrinkles are no different, and though there are plenty of treatments coming out every day, there are a select few easy ways to avoid investing as much money and time later on.  Moreover, for most people these solutions are relatively cheap.

1. Protect your skin from sun damage: sun damage is the biggest contributing factor to skin damage.  UV rays can penetrate the skin, drying it out, causing cell damage, and moreover can cause cancerous cells to grow.  So avoid the sun during high intensity hours, generally between 10AM and 4PM.  Second, when you are out in the sun, wear protective clothing, and no this does not mean your teeny tiny bikini.  This means long sleeved shirts and solid fabrics such as denim.  Some companies even make SPF specific clothing, designed to allow air to blow through to keep you cool, while protecting you from sun damage.  And if you must expose your skin to the sun, wear sunscreen.
2. Avoid smoking: while smoking is harmful to your health in general, it can be especially detrimental to your skin.  Smoking causes the blood vessels in the top layer of the skin to atrophy and narrow themselves, decreasing blood and oxygen flow as well as the flow of nutrients to the skin.  All of this damages elastin and collagen fibers, and many suffer noticeable damage in just 10 years of smoking.
3. Wash gently: Though you want to clean your skin on a regular basis, you don’t want to dry it out or kill cells unnecessarily.  So avoid strong soaps that will dry out the skin, avoid additives or other ingredients such as retinol that may irritate the skin.  Pat your skin dry, and use warm water at bath time instead of hot.
4. Moisturize!: Moisturizers help your skin to heal itself.  Skin naturally dries out as we age, and while a moisturizer cannot in itself fix the problem once it is there, it can help to prolong your time without it.  If you think you need a moisturizer, you should probably get one.  However, if you are unsure, just wait 20 minutes after a shower and see if your skin feels tight.  If so, you probably need a good moisturizer.
5. Shave with caution: This is more clear for some than others.  Some have more sensitive skin than others.  But, shaving, no matter how insensitive or sensitive the skin, can cause irritation.  So use some common sense, even if it doesn’t make sense to you now.  Don’t shave dry skin, it does more than just hurt afterward.  Use a clean and sharp razor for optimum hair cutting and minimum irritation, and shave in the direction of hair growth. 

If you already have a wrinkle problem, you should still follow these tips to improve skin health and improve the effectiveness of any product or treatment that you may be using.  However, if you do not yet have wrinkles, this can help you to look younger for much longer, without having to spend extra money.