I don't know if anybody mentioned this but I always do my tires/wheels first. It seems like they take the most time. And don't forget your wheel wells. They more or less "frame" the tire so get the mud and debris out of the wheel well. Mine are black so I make sure if there are stains they get some black paint.
When you dry your car (I use a leaf blower and 100% cotton towel) don't forget under the hood. A few minutes wiping things off will pay off in the long run.

Pat