"It's not fun when you're burning!"
Anime conventions are awesome and cosplaying just makes it better. I love to cosplay you get loads people ask to take pics of you and you get to interact in person with loads of people and share your fandom. Anime cons for the win!
my advice: watch out for glomping and crazy fans(they're great people...just be careful), bring money to spend (50 to a few hundred USD can get you alot), go to panels and events(u learn whats new and stuff and theyre loads of fun), eat. dont starve! bring snacks(for yourself and to share:]), wear comfy shoes, bring a camera and extra batteries(extra batteries!), hygiene!(optional: bring febreeze or something similar).....thats all i can think of right now....:D