I wouldn't quite recommend rushing it, but honestly I'd recommend you to first
Scrub your head (after splashing some hot water on your head) - about a minute or two
Apply shaving gel of your choice and then, apply your normal soap all over your body(assuming you shave when you are in the shower), which gives time for the shaving gel to soften your roots
Do a single pass of the razor with the grain
Rinse, complete your bath
Lather up your dome again, dry yourself(your body, not the head)
Go against the grain, touch your head for any spots you missed, shave without lathering up
Finally, apply your after-shave of your choice
Dress up, drive up

I've been following this routine for 3 days(not a lot, I know

) but I am done fairly quick.