Useful Vim Tips

I found a site with some interesting Vim tips. Check out these links:

A couple of highlights:

Run a macro on lines that match a pattern:
:g/vim/ norm @a

03wdei^R=2012-^R"^M^[0j - see here

And useful information on ed:
Actually using ed

I became interested in ed after learning this trick. It seems like it might be useful at some point.