Intermediate level vi tricks (and "just" a couple of really advanced ones)
"This is all intermediate level vi. None of it is Vim specific and there are far more advanced tricks in vi if you’re ready to learn them. If you were to master just these intermediate concepts then you’d probably find that you rarely need to write any macros because the text manipulation language is sufficiently concise and expressive to do most things easily enough using the editor’s "native" language."