Start with squeaky-clean tresses. To prevent roots from becoming greasy quickly, trade your regular shampoo for a clarifying or deep-cleansing one, and make sure to thoroughly rinse out the conditioner.
Shower smartly. Drops of moisture can accumulate under a plastic shower cap and ruin your newly sleek do. Instead, wrap a terry cloth towel around your head (to absorb the moisture), and then put on your regular plastic shower cap.
Keep it fresh. To sop up excess oil on your scalp, sprinkle hair powder onto the roots, then brush out. Plus, you'll get some extra volume on top!