Beyond 140 characters: How to stretch your limits is a document about using Twitter effectively for brands. It discusses that Twitter allows brands to deliver relevant messages to 255 million global users in real-time. Twitter is also where conversations about live TV and events happen. The anatomy of a good tweet is described as short, speaking to a specific audience, including a call-to-action, conveying voice with no more than 2 hashtags. Principles for paid media on Twitter include amplifying social content, creating agile and platform-appropriate content, and synchronizing with cultural trends. The document also discusses targeting and analyzing Twitter results to optimize for objectives.