Baby shower registry? What to put on there?

Whitney • Hi! First time mom to Desmond 💙! He was born at 35 weeks and 4 days on November 7th, 2015!
I went to look at baby stuff today to kind of get an idea of what to register for. I feel even more confused and overwhelmed by all of the different items. What would be some things you wish you thought to put on your registry and things you wish you didn't throw on there??? (Side note: We already have all or most of our bigger items: crib, crib mattress, car seat, stroller, bassinet, playpen, changing table and high chair.)