Remember always to brush it with a good brush and to keep it clean.
While not in use, keep it in its original box or on a wig stand. Avoid keeping it in a drawer - more often than not, it can get squashed in there.
Wash it at least once a month according to the instructions which accompany the original packing. After shampooing, hang it up to dry. Do not brush it while it is still wet. This takes out the curls. When it is dry, shake it to fluff it up. If required, set in rollers while damp.