The Robert's Rules Cheat Sheet is a quick reference page for using Robert's Rules of Order. Robert's Rules of Order are essentially rules for conducting meetings in an orderly manner.
The Dialectic and Philanthropic Societies at the University of North Carolina, Chapel Hill, provide a PDF Robert's Rules Cheat Sheet in tabular format that makes it easy to find the rule for things a person may wish to do in a meeting, such as introduce business, request information, amend a motion or end a session. The cheat sheet gives the correct words to use for an action and advises if a person can interrupt a speaker for that purpose, if someone must second the request, if it's amendable and what type of vote it requires.
Other cheat sheet versions exist. The University Faculty at Cornell University's cheat sheet is more a simplified version of the rules that takes the approach that every person may participate in discussion before any one person may speak a second time.