This morning, Kaitlyn was acting very tired about 15 minutes before her normal naptime. At 12 months old, her schedule is pretty consistent down to the minute from day to day. I picked her up and started taking her to her bed, but wondered why she was so tired. Then I remembered that she got to bed 45 minutes late last night because my grandfather is in town visiting. That explained the need for her to go down for her nap early. She fell asleep right away.
This isn't some profound in action discovery, just an illustration that you are often making decisions that deviate from your normal schedule--don't be afraid to change the normal routine if it is what your baby needs.