take a song you know,lets say your favorite song. Now make a pact to never play it like you already know it.Do NOT play the same voicings or embellishments. This will give you a basically new sound out of some old material.This is a process of re-invention.You can easily after learning the inversions change the chords around and have a field time doing this.I say take your favorite song because you know the melody really well and have internalized certain nuances,this is therefore the best platform to experiment. Just a common sense way to increase your vocabulary in a musical way. Play different inversions for the chords and for god's sake do NOT substitute the chords as yet :). That is usually misinterpreted and more often than not makes you depart from the song itself,not what we intend. So first things first study the inversions please.