2. Plan your wardrobe for uncomfortable conditions.
You have two choices of convention habitats.
Either too hot or too cold, with the additional options of too humid or too dry. The larger the venue, the more difficult it is to have any sort of control over the temperature. It may also vary widely over the course of the day. Often large exhibit halls are chilly early in the morning and stifling at the height of the day. You need to plan your clothing to deal with these conditions. Otherwise, you’re going to be distracted at best or miserable at worst.