Or, since blades are cheap and I like them sharp, I just use the two and out rule. If your razor has not blade in it, put a fresh one in and use it, set the razor aside when you are done. If your razor has a blade in it already, this means you are shaving for the second time on that blade, simply discard it after the shave. And so on.
-- Sal -- Razors don't shave people. People shave people!
There are 3 critical types of life moments: Times when we should be enamoured of the finer details, and times we should ignore the minutia.