Do not get drunk on your first night there.
Lots of companies will be happy to pour you all the high end liquor you can swallow in exchange for a sales pitch, but the dry air will cause you to have the worst hangover ever. You'll be on your feet for all four days, progressively getting sicker and sicker and progressively getting less and less work done. But you're not there on vacation, you're there to meet people and make money. Don't blow it.
The education are just sales pitches, but really high end ones. If you're considering doing business with a company and they're hosting an info session, maybe consider dropping by, but the real education is meeting people for breakfast before the show starts, so start lining up breakfast meetings with useful people now.
Invest in really good shoes, with ankle support and maybe memory foam inserts. I like to go to the bathroom in the middle of the day, grab a stall, and change my socks for dry ones. You wouldn't think it makes a difference, but it really does.
If you speak to someone for more than a few minutes, hand them a business card or let them scan you. It's just good manners. If you're just going to pop in to a booth for a second and aren't going to take their time, there's really no obligation to let them scan you. I always let them scan me if I'm going to take some swag, but that's on you.
Take protein bars and water with you on the show floor.
I like to keep one pocket for my business cards and another pocket for business cards people give me.