Depending on what kind of skin resurfacing technique you choose, you'll get specific instructions for pre-treatment care from your doctor, but chemical peels, dermabrasion and laser resurfacing all have some similar aspects. For all three, you may be asked to forgo the use of face creams and lotions for a set period of time. You may also be required to apply other special creams and gels to prep your skin for treatment. There are foods, beverages and medications you may have to avoid in the days or week prior to treatment.
If you're a smoker, you should probably count on going cold turkey before any of the three procedures. You're also going to be asked to avoid direct sunshine on your skin for a period of time, depending on which procedure you're going with. Getting too much sun leading up to a procedure can yield uneven results. No matter which procedure you decide on, be sure to follow the doctor's pre-treatment orders in full so you can ensure the best possible outcome.