4J

I could never figure how to grow/shrink vertical splits in Vim - sad, but true. It never really bothered me, as I rarely used vertical splits, but now that I know how to resize the windows, I used it more and more.

So, to grow/shrink the vertical split:

<ctrl>+W and '<' or '>'

That's it :-)

O - and I found a simple short way to toggle line numbers:

:se nu!