Stay at home moms! What do you do all day?

NOT trying to be offensive. I'm going to be a stay at home mom once baby gets here. It's my first baby. I keep thinking that it's going to be boring (I'm used to working 50+ hours a week) and a lot of sitting around since infants don't do much. 
Not sure if I'm going to have a rude awakening or not lol. So to help prepare myself can I ask (if you're a SAHM), what do you do all day/what's your daily schedule like? 
Does the day pass by quickly or do you find yourself looking at the clock a lot?