You know I love the Vi – improved. And I wish I know this tip a long time ago.

Basically Vim allows you to write freely and then wrap your text to a fixed number of characters. You can use the :set tw=80 to force your text never to exceed 80 characters. And if you already have a non wrapped text, you can easily select (using visual mode) the text you like to wrap and hit gq on your keyboard, and Vim will haply apply your settings to the region.

For LaTeX and emails, this is awesome…