Use positive-flavored words. Avoid commands, but make heavy use of polite words. Instead of using words like "must" and "required" on their own, soften them with phrases like "please be advised." Avoid using "no" words, and use document design, such as tables or columns, to emphasize actions that should not be done or are not allowed, instead of frequently capitalizing words such as "no" and "not."
Write in audience-centered language. Instead of writing that you want the readers to do something or believe something, explain why that action will be beneficial to the audience. For example, instead of writing, "I would be happy if you would attend the meeting," write, "You will gain many benefits from attending the meeting."
Insert humor or lightheartedness where appropriate. Set off non-essential phrases containing humor using commas or parentheses. For example, in a blog, you might write, "One reason to stop biting your nails (and there are many)..." This adds a human or personal element to the text and tells your reader that he or she can have fun while reading.
Use a few exclamation points. Although you should use exclamation points sparingly, sprinkle a few throughout your writing where appropriate. This helps give your writing an upbeat, positive tone.