I just use a set of clippers. I actually picked my haircut based on what was easiest to cut, and I've been doing it the same way for about 4 years now - it just happened to finally become trendy. Basically, there are only two lengths of hair involved here - top and sides/back. All I do is place my non-clipper-holding hand on the top of my head as a dividing line, and cut up to the edge of my hand. Move the hand back a bit, do the same thing all the way around. I keep my hair long on top, so I only trim it every few months, which I use scissors for. If your hair is usually cut short, you can probably get away with using clippers for the whole thing, which is definitely the easiest.
That's hilarious. The top of my hair is only slightly longer than the sides but it's still cut with scissors. So I think your method may work. I'll report back.I've been doing it the same way for about 4 years now - it just happened to finally become trendy.