Topic says it all. This is my first Tube amp and is there anything I need to know maintaince wise or just plain facts I need to know.

Also on my amp I've got these two knobs under Dampening, Resonance and Presence. I've turned them up and down and no matter what it never seems to change the sound. What are they for?

Thanks guys.
well, what amp do you have?

as for general tips: let the amp warm up on standby for about 2 minutes before you start to play, and try to not crank the volume all the way for the first few minutes. This prolongs tube life. Also, don't move the amp while it's hot (right after playing) because the tubes can crack. Lastly, always treat it gently because the tubes are glass
My Guitars:
Gibson Les Paul Studio
Epiphone AJ
Ibanez Strat Copy

Orange Tiny Terror Head
Old beaten up Peavey cab
Marshall MG30DFX