Damian Erskine's Chord Inversion Exercise
Get a free lesson from Damian, basically. I know I re-post a lot of stuff from him, but its pretty much impossible to improve or elaborate on a topic he discusses, so might as well link to the source.
In this clip he goes through the chord tones of "Falling Grace" and how he plays them with the smoothest voice leading as possible.
He does it on six-string, but the concept will certainly work on 4, and the general idea of keeping voices moving the shortest possible distance is applicable to any tune, no matter how many strings you have.
Hmmmm. More chord spellings and knowledge of inversions. Those must be like, some important key concepts to know how to do or something.