TIPS for first time goers:
1. Pack a lunch, it's less of a hassle than having to wait in long lines at the fast food places near the congress centre.
2. Drink lots of water and don't get dehydrated. they usually have free water stations set up in the congress centre/doubletree hotel so help yourself.
3.
Ask people before you take their pictures. you'll get a better picture than a secret shot and if you decide to upload your pictures on the AN facebook group/cosplay.com thread later, I'm sure the cosplayers will be grateful to have posed pictures of themselves
4.
Don't buy an item in the dealer's room as soon as you see it. go around to the different booths. Often they will be selling the same merch at different prices and you don't want to get ripped off.
5. AN is a great place to buy manga and DVD sets because there's no tax and you're usually charged the cheaper US cover price.
6. Try to look online on amazon/ebay for things in advance so you have an idea of what prices are like for the merch you want, especially things like bags. you don't want to be ripped off by feeling pressured to buy there.
7. the doubletree bathrooms are much cleaner and there are no lineups.
8. for the love of god, don't lose ANYTHING, especially your driver's license/wallet/AN pass.
9. pack light if you're commuting by GO and don't have a car to store things in. You don't want to be dragging around a DSLR and 6 lenses, especially if it gets hot. Also, don't bring a bulky backpack because it's really crowded in the dealer's room so you'll be hitting people with your bag all the time.
10.
PROPER FOOTWEAR. an absolute necessity. you'll be walking for 90% of the time, so make sure your shoes are comfortable.
and yeah, definitely get there like 2hrs early, even if you've pre-registered. the lineups become massive.