The document provides six guidelines for using exclamation points in business communications: [1] Use sparingly as overuse can appear like yelling; [2] One exclamation point is enough as multiple ones suggest being too worked up; [3] Don't combine with other punctuation marks; [4] Consider the context and be more flexible in informal communications; [5] It's okay to show personal interest when appropriate, like for a co-worker's achievement; [6] Share your enthusiasm sincerely for accomplishments like "Great job!"