I’ve learned not to put too much into the monitor. I rely on the monitors for the vocal mix. And I need the keyboards in the mix too. I usually leave the bass guitar completely out; I hear plenty of it onstage. Guitar is different: Most guitar amps are very directional, so if they’re faced straight ahead toward the audience, you can’t hear them on the drum riser. So I keep a small Fender Twin 12" amplifier to my right, on the corner of my platform. I have a knob right there to adjust it, if I want more or less guitar. That way, everything I’m hearing is clean and my mix never gets cluttered.