Just saw that Zack Rusin has posted a Git cheat sheet on his blog. This came in really handy since I am moving from SVN to Git.
I am sure, some of you will like/love it too 
Download Instructions and More information at Author’s Blog here.
As the website says:
You spend more time online than on the road, but you probably think more about avoiding traffic than enjoying the best of the Web.
So, why not customize your Firefox for the things you really love to do? Take your browser from simple to spectacular.
Firefox add-ons are little extras that allow you to add a personal touch to your browser. Select your favorites from the categories below to accessorize your Web!
So why not Fashion Your Firefox?
Note: Image copyright, Mozilla and their respective owners