Take and maintain pictures of everything including appliance labels, motors, wiring, etc.
Label all wiring and take more pictures before removing changing etc.
And like the above post keep them safe in the rig. I keep my files on the laptop and backup copies at home and in the rig.
And find out how to manually retract the slides for the day when not if they won't retract when you push the button. This should be a high priority item since with a deployed slide you are not going anywhere.