Someone told me not to try to make a happy baby happier. Deep thought, eh? I interpret this to mean that a person blissfully staring into space does not need her mother to shake a rattle in her face.
Don’t be afraid to give baby some alone time in the crib. Do you need to do some online research, uninterrupted? Put away groceries or talk to a friend?
Put some music on in baby’s room, or turn on her mobile and let her be for a while.