When in command mode, you can grab the word that is under the cursor. Makes search and replace for those long function names painless.

C-r C-w

The other little trick I didn’t know about until I accitently brought it up was the command history. This subtle little thing makes a huge diffrence. You can use normal vim movement keys to edit the commands, and when you are done just hit

REXML could not parse this XML/HTML: 
<enter> on the line and it will execute it.

q:

Of course you can do the same thing with search.

q/