JezebelinHell wrote:5. Don't make any plans your first year. Just wander around and take it all in. There are a hundred amazing things going on somewhere on the playa at any given time,
That's an understatement. Good advice.
Also, the spectacular stuff happens toward the center but the weirder stuff happens toward the outer streets.
Don't be so overwhelmed at the spectacle that you become afraid to or forget to talk to people, especially if you like you just wandered into some science fiction planet. If you think "I met this person on the playa so they must be cool in the real world" you might be disappointed (or not), but the Playa People are generally amazing, and the random conversation you stumble into on somebody's boring-looking couch in the 'burbs might be as memorable as all the art and fire.
The best experiences you have will most likely be unexpected and random.
If some cute couple wants to trade or buy drugs, they're probably cops.
Once you feel like you've arrived, try to experience at least one Black Rock City sunrise with your girlfriend. It's hard to explain, but, I think it's like holding hands and seeing god together.
It takes at least a day and a night to wrap your head around what's happening. Allow it. If it gets too much, just go find Center Camp. Don't be afraid to tell people it's your first day/night. Welcome Home.