If you have done this before, any suggestions on technique...?
Usually what I do is open up my tri-fold medicine cabinet so I can see the back of my head.
Then I take clippers, and go over the metal part with alcohol. If you don't put alcohol on the clippers, you'll get bumps and possibly a rash. That thing is covered in bacteria.
Then I start at my right sideburn, and work my way up to my crown. Then I do the left side. Then the top, then I use the mirrors to make sure I don't have any stragglies in the back of my head. When I'm feeling energetic, I get some shaving cream and cover the whole dome. Then a Mach-5 razor I go over the whole ensemble until all the shaving cream is gone. Then some moisturizer to make it shiny, and prevent scalp flakes.
Then voila. I'm ####ing gorgeous.