Let Baby Drive the Nap
Just as you do at nighttime, encourage your child to fall asleep on his own. "Don't fall into the habit of helping your child fall asleep by extraordinary measures that you don't want to do forever," says Dr. Mindell. Those measures might include putting the baby in the stroller or car seat and going for a walk or ride for every nap, or allowing your baby to nurse throughout the nap. Likewise, do not become a slave to holding a pacifier in place for the baby who cannot yet get it back in his mouth and doesn't remain asleep when it falls out.
If your baby fusses after being asleep for a few minutes, or even a half hour, don't run right in to rescue him from his catnap. He may settle back down on his own after a short bit of crying and go on to sleep another two hours. My babies did this unless they had been sick or teething, and in that case the crying escalated, letting me know I needed to go in and check on them.