Vim links

People either love vi or hate it; if you hate it, sod off and take your parentheses with you.

It's good to have a printout of the vi reference card handy, and a cheat sheet or two saved locally:

Vi Reference Card (PDF)
Graphical Vim Cheat Sheet (GIF)
Vim Cheat Sheet

In support of the "learn a new vim command every day" effort, both Vim Tips and the Vim Cookbook have proved interesting, as has the piping feature.
Speaking of pipes, pv is quite an interesting utility. So is histring, but it doesn't seem to be available (or maintained) except in rpm.

Vim has a ton of plugins worth checking out, including:
FuzzyFinder
OmniComplete
TagList
RenameWithCScope
C Call Tree Explorer
SourceCodeObedience
VimDebug
MiniBufferExplorer
SnippetsEmu
AllFold
Fly
SessionManager
Alternate
RunView
Scratch*
VcsCommand
MultVals
GitCommit
GitDiff
GitFile
Git Branch Info
There is also NERDTree, but its moderate utility does not justify its horrible name.

Most languages have syntax and snippet plugins, such as:
C
Python
Ruby/Rails
Perl
SQL
x86 and x86-64 asm
XML/HTML


Finally, to forestall the inevitable requests, here is a sample .vimrc .