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There are so many self tanning products out there, it can be difficult to choose one that will work for you. Some formulas allow you to build a tan gradually over the course of a few days or a week, while others immediately stain your skin bronze. Some are long-lasting, while others wear off after a week or wash off at the end of the day. Figure out which product is best for your needs:   Gradual self-tanning formulas. These come in the form of creams, gels, sprays or foams. Gradual self-tanning formulas usually contain either dihydroxyacetone (DHA) and Erythrulose, both of which work by reacting with the amino acids on the skin surface to create a darker complexion. One application will darken the skin by just a shade or so, but you can keep applying the product over the course of several days to achieve the color you want.  Instant tanning formulas. Most instant tanners are sprays that you can apply immediately for a sun-kissed look. Some stay in place for about a week, while others can be washed away at the end of the day. Instant formulas are trickier to apply than gradual formulas, since they stain the skin right away and might leave streaks.  Face tanning formulas. Look for a self-tanner designed for use on the face if yours is on the sensitive or oily side. While most self-tanners work on the body and the face equally well, you'll want to get one specifically for the face if your skin is a little finicky.  Pick the right color. If you have fair skin, choose a light to medium color. If you have olive skin, choose a dark formula. You can always reapply the self-tanner to deepen your tan if your first application looks too light. Thick hair can get in the way of self-tanner when you're trying to apply it evenly. You might want to shave or wax your legs (and arms, if necessary) to ensure you'll be happy with the final appearance of your tan.  If you have fine hair on your legs or arms, there's no need to remove it before tanning unless you want to. Guys might also want to shave or wax the chest or back before applying self tanner. No matter what your skin type, is, it's best to exfoliate well in the shower before tanning. When your skin has dry, flaky patches, it's a lot harder to apply self-tanner evenly, and you'll end up with a patchy look instead of a pretty finish.  The chemicals in self tanner react with amino acids in the upper layers of your skin. By removing the uppermost layer (which would've sloughed off on its own soon anyway) you're ensuring that the tan develops in a fresh layer that's going to be around longer. Also, dry skin tends to absorb more color, increasing the likelihood of an uneven tan. To exfoliate, use a washcloth, a scrub brush or scrub gel to thoroughly exfoliate all of the areas you're tanning.  Focus on rough spots like your elbows and knees. The self-tanner tends to darken these areas more than other parts of your body, since it soaks in faster. Rough skin will cause the application to look even more uneven. Moisturize the skin after exfoliating, particularly if your skin is dry. Pay attention to areas like the knees and elbows where tan can build up. Use lotion or oil to trap the moisture in your skin after your shower. Allow it to fully absorb into your skin over an hour or so before you apply the self-tanner. It's important that while you're applying the self tanner, your skin is completely dry. If you're going to be in the bathroom, wait for any humidity from the bath or shower to subside. Make sure it's cool enough wherever you are so that you don't sweat for the next few hours. A rushed self-tanning job is immediately obvious. You'll miss some spots, have streaky areas or stain your clothes and hands. Do yourself a favor and set aside several hours so you can make sure you have enough time to thoroughly and evenly cover each area you're planning to tan.

Summary:
Choose a type of self tanner. Remove thick hair from the places you want to tan. Exfoliate your skin. Dry off. Allow several hours for the tanning process.