Here you see the charge symbol I've done, a basic arrow, which will point in the direction your unit is charging. This will make it obvious to both players who is charging, or charged, and it just helps to relieve some of the pressure some may feel trying to remember certain aspects of their game.
|One of the Re-animation Tokens|
What I've done here, as well, is use big buttons for those things that affect a whole unit, whilst smaller buttons will be those things that affects a single model. That way, I have more leeway when playing as well, because I can put more buttons down within a squad if they're smaller.