Watch the Chords online guitar lesson by Walter Broes from Rock, Billy, & Boogie Guidebook
I failed to mention the very obvious here: you’ll need a good grasp of the typical dominant seven chords. Knowing different inversions of dominant seven chords all over the fretboard is very useful, and a great way to explore the fingerboard. Try playing licks you know in one chord shape in a different place on the fretboard around a different chord shape. Having a basic grasp of where the root, third, fifth, and seventh are located in your chord will only speed up the process of using them effectively and playing around chord shapes and the arpeggios associated with them.