Try to know key levels for character spells, Mainly Pet characters. Do not invite a Magician and get angry at them when their most recent pet is Earth or Water.
If a player is not playing a character quite as good as you would, do not get angry or degrade them. Try to give hints, but not come on too strong.
Edited, Sat Jun 4 09:47:49 2005 by Onoskelis