Two simple ways to stay on top of e-mail

Everyone in the modern world seems to complain about e-mail. Like, everyone. I've had a bunch of jobs, in a bunch of different industries/verticals/cities/bosses, and regardless of all the differences, this whole concept of 'OMG, I cannot stay on top of my e-mail!' permeated at every single place. It's gotta be universal, at least in white-collar cubicl…