Natalie Downe gave an extremely good presentation at BarCamp London on the use of CSS Systems in order to standardize your site's stylesheet design, and make it much easier to maintain.

Lots of good pointers in this one, definitely worth a look.

Install

sudo aptitude install git-core

Basic Commands

git init                   ...init repository
git add .                  ...add everything in dir to repository
git commit -a -m 'update'  ...add + commit changes
git diff                   ...show changes since last commit

git add [file]             ...add file
git rm [file]              ...remove file
git mv [file]              ...move file

Mirror Git Repository

rsync -azvCL --delete --progress
   -e "ssh -i /home/[user]/.ssh/[mykey]" .git/* 
[user]@[user].strongspace.com:/home/[user]/[project]/.git/

Ignore Whitespace

git-apply --whitespace=nowarn