After playing here for a year and making every possible mistake there is to make on this server, I feel like I am qualified to hand down some wisdom.
1. Turn your graphics settings in NWN to the fastest possible speed - I have a 3.0 GHz dual-core with gobs of RAM and the latest, greatest video card, but I keep all the bells and whistles turned off. I want the only bottleneck between my mouse finger and the EfU server to be the internet tubes. It's not as pretty, but we're all using our imaginations here anyway, right?
The benefit: I can participate in combat with 30 other players in the same area. 'Nuff said.
2. Never play EfU unless you've had plenty of sleep and are in a good mood - One of the wisest people I know once told me, "Just get to work every day on time and in a good mood, and everything else falls into place." It's just as true for work as it is for play.
The benefit: In addition to making you a better role-player, a good mood helps you live longer. It does not make you immune to stupid decisions, but it does give you at least a +4 will save vs. foolishness.
3. Death is caused by players, not characters - If you die, it's not because you have a weak character build, it's because you aren't playing your build correctly. You did something dumb, and now you want to take it out on your character. Resist the temptation to go permadead, suck it up, roleplay a near-death experience and just respawn. Everyone else does it.
The benefit: Your character can last long enough to form the kinds of in-game relationships that will keep them alive and happy. This cannot be emphasized enough. No one character can survive alone. Your low-charisma min/max solo character is a dead man walking.
4. You're only as tough as your last level - If you're level 6, you're really level 5. If you think you are really level 6, just go out and act like it, and you will quickly be proven wrong.
The benefit: Not only do you exercise the proper degree of caution by thinking like this, you are also adequately mentally cushioned from the next thing that gets you killed. Check that, almost killed.
5. A good death is the best thing you can hope for - Your character will not last forever, and neither will EfU. Nothing here is saved for posterity. There are no leaderboards, and there is no Hall of Fame. The best possible outcome, actual escape from the Underdark, ends the life of your character on this server. You're just here to have fun.
The benefit: This one ought to explain itself.