*Note: Incomplete
Here are some of the options I have found useful / acceptable in a production apache setup, please note I make no guarantee that these settings will work for your setup. that said enjoy your tweaking.
When every byte counts...
Cleaning all comments from apaches configuration files.
sed '/^\#/d' /etc/apache2/apache2.conf > /tmp/production_apache2.conf
When you are sure its ok to replace it.
mv /tmp/production_apache2.conf /etc/apache2/apache2.conf
