Nerd conventions, especially the larger ones like SDCC or Gen Con, can be fun, but also frustrating. The following are suggestions that may help you get through.
Accept you cannot go to all the places and get all the treasure.
Set a victory condition and pursue it. "I want to see these guests and play these games," or what have you.
Survive to hit another con later.
Leave time to cruise the vendor room.
Leave half your money at home.
Don't buy anything on Friday.
Have fun storming the panels! #consurvivalguide