Watch the The bVI V Connection online guitar lesson by Brad Carlton from Guitar Lab: The I IV bVI V Progression
A great practice scheme is to work on a "link of the chain". By that I mean the "chain" is the progression, and the "links" are the pairs of adjacent chords. In this lesson, we'll be studying the connection between the bVI and the V chords. I've provided a jam track for just these two chords.