- Sleeping on a floor doesn't work. I'm a person who can usually sleep on anything (tile, hard wood, anything) and be perfectly fine. But you gotta remember you'll usually get ~5 hours of sleep a night, and you need to make the absolute most out of it or you will be miserable.
- Connect with people beforehand so you know for sure you'll have a group to hang out with. It's creepy when people just sort of follow groups around, and the people that do it are often oblivious. THAT SAID, there are lots of people that are more than happy to bring people to restaurants/ the store/ etc with them if the person isn't terrifying.
- Shower. Please.
- Don't drink alcohol or do drugs if you aren't used to it. I honestly could not care less if people do whatever the heck they want with their bodies at lan, but it's 2nd-hand-embarassing and people will see right through you.
- Don't rely on credit/ debit cards if the LAN you go to is far away. Always have some cash, because banks tend to freak out if you don't travel regularly.
- It doesn't matter if you're good at the games, as long as you aren't throwing.
I don't know about any summer lans, but the GXL and FITES are the two standard east coast lans. FLAN is also pretty fun from what I've heard.