Vim: write back my file on each key press

Question

I\'d like vim to automatically write my file as often as possible. The ideal would be every keystroke.

I need to save regularly so that my background build process wi

Answer 1

If you're running Linux, you can take a look at
http://www.charlietanksley.net/philtex/vim-live-latex-preview/

He's using scripts and MuPDF(a lightweight pdf viewer) for live preview of latex markup.
It's very fast and the best/easiest solution I have found so far.
I've been using it for quite some time now and it works great!