Put your son down when he's tired. A mistake many parents make is waiting too long to put their baby down for a nap. You usually will have a window of opportunity when your baby will fall asleep easily and quickly. If you wait too long, your baby will be too tired and have a harder time falling asleep. Learn how to read your baby's signals.
Some babies rub their eyes, while others get fussy or stare off into space.
The moment your baby tells you he's tired, put him down for some shut-eye. Teach your child to fall asleep on his own. By two to three months of age your child should begin learning how to soothe himself to sleep, whether by sucking his thumb or a pacifier, cuddling a favorite toy or simply drifting off into slumber. Start giving your child the opportunity to put himself to sleep instead of rocking or nursing him so he can doze off. Once your child learns to rely on himself, you may find that he'll nap for longer stretches.