Nearly through my first time attending Apple's Worldwide Developers Conference (WWDC) and I'm been thinking about some useful bits of knowledge I've picked up this week. Next year, if I do by some chance land a ticket, this list of tips should help me (or anyone) take the most advantage of WWDC week.

Register early - fly in early or midday Sunday, head to Moscone and pick up your badge and jacket. I got in Sunday evening just as registration closed, and wasn't able to get my badge until Monday morning. Well, that made things interesting after I had gotten up at 4AM to get in line for the keynote, waited for 2.5 hours, and then started shuffling closer to the entrance as they began bunching us together in front of the entrance doors. At about 6:30 a friend recommended I get in the registration line and they'd watch for me if I made it back in time. I got in line for registration which was about 100 people long at that time, and at 7 AM they started letting us in. Registration was quick, but they started letting the keynote line in at about the same time. Luckily I made it back before my friends went through, but 5 minutes longer and I probably would've missed my friends and had to get in the back of the line.
Register early part 2 - Smaller sizes of the jackets run out quick. Mediums ran out by about 6pm Sunday and larges ran out sometime Monday morning. The jacket is cool, so you'll want to get a size that fits.
California in the summer does not always mean hot hot hot. I naively packed just one pair of jeans and a plethora of shorts and short sleeve t-shirts. Well, when I got off the plane it was chilly. Monday morning, it was chilly. Each evening, it was chilly. I ended up buying a sweatshirt at a shop and my WWDC jacket also came in very handy.
Go to the UI Design lab on Tuesday morning at 8:30 AM, otherwise you probably won't get a spot. The UI Design labs are one-on-one 30 minute appointments, so you can't just walk in like the other labs. They also fill up quicker and quicker as the week goes on.
Checkout wwdcparties.com and RSVP for events early! I missed out on a couple events I would've loved to attend, including the NSHipster pub night, a meetup with fellow CocoaHeads convenors, and Parse's party. Next time I'll definitely RSVP to these events early.
Use the twitters. Have a framework you really like? Tweet about it and ask if any others that use it want to meet up. I met up with another #restkit fan and had a good 20 minute convo with the guy. It was cool.
Talk to everyone. In lines, in other lines, and in more lines. Oh, and there are lots of lines, everywhere, not just for the keynote. The staff did a great job of keeping things organized that way, and it was a good opportunity to meet some interesting people and hear about some awesome apps I hadn't used before.