A schedule is not only helpful for you to know when your baby eats and takes their nap.  It is also good for your baby because there is less change of belly aces to too much gas if they don’t go from eating 5 times a day one day to 9 times the next.  If you didn’t start a schedule when you came home from the hospital then I highly recommend starting one now.  If you feel like it is too much to wait every four hours to feed your baby, do every three.  That is what I had Alex on.  He ate every three hours which turned out to be at 7, 10, 1, 4, and 7.   It helped greatly when we were developing a nap time and a bed time and getting him to sleep through the night.  It is also a good guide to changing diapers.  If you haven’t changed a diaper in a while, just change it at least every time your baby eats.