Dragon*Con comes up next week. And we all know that cons aren't for sissies. There are still some good rules, or guidelines as it were, for surviving at Dragon*Con (or any other convention).
5-3-1 Rule: 5 hours of sleep, 3 meals, 1 shower
This should be the minimum mandatory for us all especially concerning the shower. 40k+ people packed into that small a space requires good hygiene habits.
Hygiene rule: Cleanliness is next to Wheatoness.
Wash your hands frequently and before you put anything in your mouth. If you're not near a sink, use hand sanitizer. Con crud sucks and you don't want to pass it on to anyone else. And if you see me on Sunday, you might want to run away screaming or put on a hazmat suit. That's usually when my con crud kicks in.
Elevator rule: You will have a hellacious wait.
If there's space on the elevator, get on it. It doesn't matter if it's going the direction you want. It'll go that way soon enough. Of course, I don't know why you're bothering to try to take the elevator. Just take the stairs.
Corollary to the Elevator rule: Pointy costumes on the elevator, wait for the next.
Trust me, I've gotten poked in the face/back of the head/tit too many times while pressed back against the glass in an elevator at the Hyatt.
2nd Corollary to the Elevator rule: Be prepared to get up close and personal with strangers.
I swear, dude, I did not mean to grab your ass. I got bumped by Chewbacca. Okay, the first time, I got bumped by Chewy. The second time was an ass grab. Sorry. Nice top hat, by the by.
3rd Corollary to the Elevator rule: The Stair rule: The stairs can be your friend.
BISis has no patience with waiting for things. She also doesn't understand any of the DC elevator rules. I'm prepared to take the stairs most of the time. I've requested again that we be on the 10th floor or below. I can do 10 flights a couple times a day. Two years ago, the 16th floor almost killed me. By the by, the stairwells are gross by the end of the con.
Line rule: Talk to people.
I've always had great conversations with complete strangers while waiting in line for my badge (really, with as long as that wait is, you might as well enjoy it) and for panels. Dragon*Con is filled with people just like you. You never know, you could make life long friends, or at least, a weekend drinking buddy. If you're near me in a panel line, ask to join in a game. I'll have Zombie Dice and Cthulhu Dice with me this year. I'll also be taking photos of any game of them I play to submit to the As Seen On Tabletop tumblr.
Costumes rule: Be prepared.
Have a sewing kit. Always change your underwear. Or possibly don't plan on wearing the same costume/outfit everyday. Also consider how difficult it will be to navigate stairs, rows between chairs, and the bathroom in the costume. Also be prepared for the heat. Atlanta is called Hotlanta for a reason.
Corollary to the Costume rule: Don't stand too close.
I love steampunk outfits. They are fantastic. They also frequently have sharp, and pointy edges especially if they have steampunk fairy wings. Don't walk to closely. Pointy hurts. (Pardon my Willow moment.) This goes for costumes with weapons as well. It's all fun and games til someone gets an eye put out and most people don't look good in an eyepatch. They're also hard to game in, eyepatches that is.
Mary Poppins rule: Be prepared.
There's a reason I carry a Bag of Holding to D*C. I have cameras, wallets, OTC meds, snacks, drinks, sweaters, notebooks, pens, tissues, hand sanitizer, wet wipes, clorox wipes, face wipes, and who knows what else.
Second most important con rule, (i.e. The Wheaton Rule): Don't be a dick!
Listen to the wise and all knowing (or mostly knowing anyway) Wil Wheaton. He know of which he speaks.
And above all else, Most Important Con Rule: Have fun!
As usual, I'm forgetting a few here. Feel free to add more to the comments.