This is probably old news in the WordPress world since 2.6 and subsequent versions have been released, but given I've decided to stick around using it for a bit longer I thought it was worth getting right when I installed it fresh here since the [forced] move.

One feature I really don't use is Post Revisions. While I can see the benefit of using it on a Wiki, on a blog written by just one guy it doesn't really make much sense; plus it adds junk records to the database which makes backing up said blog a more time consuming process than it needs to be.

Courtesy of Lester Chan, if you want to turn Post Revisions off, just add the following line to your wp-config.php file.

define('WP_POST_REVISIONS', false);

He also has instructions on how to delete existing entries made my Post Revisions if you've had it turned on for a while.