Watch the Fareed's Trade Secret #1 online guitar lesson by Fareed Haque from Jazz Comping Survival Guide
Don't be shy!
The simplest way to add spice to a jazz arrangement is to slide, slide, slide.
Experiment with this:
Approach every chord from above or below by 1 fret and just see what happens.
Try sliding in from 2, 3, 4 even 5 frets (how daring!)
(Aside) speaking of daring. Jazz critic and writer Howard Reich put together a Chicago Tree of Chicago jazz musicians. I made it onto a branch or twig somewhere, labeled as "daring jazz guitarist", since then I've often thought I should start appearing in jazz clubs in tights, mask and cape.