Scott Herbert provides concise instructions on using Twitter effectively in 3 sentences or less:
1) The document introduces Twitter as a microblogging and social networking service that allows users to follow others and see their tweets, and to publish their own tweets of up to 140 characters.
2) Basic Twitter tasks like signing up, following others, sending tweets, using short URLs, and replying are explained step-by-step using the standard Twitter web interface.
3) Advanced features like different ways to access Twitter and using Twitter for self-marketing and research are discussed in later sections.