While running Vim, the :help command is a great resource, if you know the name of what you're looking for (for example, :help wrap), and not so helpful if you don't. For more general questions, tips, tricks, FAQs, and similar, Vim's web site is particularly useful: www.vim.org. In particular, the vim tips wiki is a repository for all sorts of tricks. Once you've mastered the basics, have a look at what the Vim experts have contributed. At http://vim.wikia.com/wiki/Vim_documentation you can find several other high quality sources of information.
I highly recommend Steve Oualline's book Vi Improved - Vim. Although it was written for version 5.7, it is still mostly up to date and covers a lot more than this Woodnotes Guide does! It is even available as PDF download.