A few quick questions regarding batteries:

What does everyone use to cycle/condition rx/tx batteries, and how often?

Also, is it OK to leave the plane (rx) continually plugged in while not in use? I find that good flying weather kinda sneaks up on me around here and sometimes I don't have the plane charged and ready to go. So is it OK to leave the plane continually plugged in and charging, or should I put it on some kind of timer?