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.
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Need to catch up on the rules so far?
Rule 1, Rule 2, Rule 3, Rule 4