Those new to the vi editor will gain proficiency, and experienced users will gain a valuable refresher.
This tutorial shows how to use vi, a powerful visual editor. Using an accelerated "cheat sheet" method, this tutorial aims to make you a proficient vi user without requiring a huge time commitment. You'll quickly learn how to move around, edit text, use insert mode, copy and paste text, and use important vim extensions like visual mode and multi-window editing.
vi intro -- the cheat sheet method (free registration required)