Feed well, and feed appropriately! When it comes to your events, especially the outdoors ones, choose your menus wisely. Lots of hot and fried foods after 8 hours in the sun, particularly when your guests aren't used to the heat, is not a good idea. So the key is to offer as many light and refreshing selections as possible.
Need to catch up on the rules so far?
Rule 1, Rule 2, Rule 3, Rule 4