To shovel or not to shovel?

OK peanut gallery... What's your take? When expecting multiple inches of snow, do you shovel in shifts or just wait until it has all fallen. Take into consideration no snow blower. 

Much of this depends on the weight of the snow. Todays snow is light, so light Little Missy and I couldn't even make a snowball with it this morning. (We tooled around for a bit up and down the street. I don't think she has been outside except to run from the car to a store and back in over two weeks. She was due for a bit of fresh air.) We are shoveling in shifts today. With 5-9 inches expected we thought, sans snowblower, we would be better off doing one mid-day and either late tonight or tomorrow morning. Ahh... the dilemmas one faces when living in Minnesota.