I'm wondering what methods/tips/tricks you use to balance out your amp volumes on your different channels or presets.

I typically start with my medium gain and get that where I want it and then set other levels for others by ear. I'm often right (whatever "right" means), but am curious how others do this.

In particular, I'm a gigging musician so those of you setting your levels for live shows is really what I'm curious about. Playing in my living room has no consequence if my levels are off, so I try and get things right so I can play a live show and switch tones/presets live.