I've just indulged myself and bought a wireless mic, so the mics and instruments are now all wireless. We have mains leads and input leads to both PA speakers and both active monitors, sometimes mic up the bass drum, and other than that there's just the leads from pedalboards to amps. Oh, and the lighting. The only leads now that go across the stage (rather than round the back) are the bass drum mic lead (which we put under the stands so there's as short an exposed run as possible) and the lead connecting the two monitors. Reasonably tidy, there may be a bit of room for improvement in the mains area.