Packing sandwich condiments on the side reduces risk (of mushy bread, bleh!), but contract terms on the side only increases it. Use this checklist to make sure your teams don't spoil the deal! 

Perfectly proportioned, it starts with a short, but robust explanation of when side letters are used, and then lists the basic ingredients that make them enforceable. Finally, it ends with a sweet reminder to check with Legal before signing. [Insert chef's kiss here]