The rear delts usually get neglected, but this is a pretty easy fix and one you can do at home on a daily basis. The band pull-apart will bring your sad little finger-sized rear delts up to snuff quickly.
You don't need a heavy-duty resistance band because you're going to keep the reps high. Rock bottom rep range is 20, done for 4-5 sets daily.
At first glance, it might seem that the title of this article is a double entendre (you know, like "Kid Rock Rules!"). I assure you, it's not. My linguistic reference of choice is not a music-challenged snowboarder but the Oxford English Dictionary, or for all you acronym lovers: OED.