I don't remember where I learned it, but I use the acronym SALT for my pregame with line judges:
- Signals - I make sure they know the basic in/out signals, along with reminding them that a ball that touches the line is in. I also ask them to get them in the habit of giving me a signal at all times.
- Antennas - Reminder that the antenna extends all the way to the ceiling, and that a ball must pass over the net completely within the antennas, otherwise it is out.
- Lines - I tell them the lines for which each will be responsible, and remind them that they are allowed to move to get a better view of their two lines.
- Touches - Reminder to watch for touches, and instruct them on the difference between making an out call and a touch call.
I will usually add quick reminders on foot faults, who is to hold the ball during time-outs, and for the line judges to not chase after loose balls. If I'm feeling really lucky about my line judges I might also comment on their positioning during time-outs and their positioning for any server who serves from the left third of the service area. I end it by telling them to have fun, and I always look for my line judges after a match to thank them for their help.