Here are some random links for getting started with, and using git and Sublime Text 2.
For getting started with git, the book “Pro Git” by Scott Chacon is chock-full of great information, and it’s available for free: http://git-scm.com/book
The git reference manual is a great place to look up specifics for commands: http://git-scm.com/docs
PeepCode also has a couple of good screencasts on git:
For a more academic and in-depth treatment, which can be very helpful for wrapping your head around git, see: http://www.sbf5.com/~cduan/technical/git/
And last, but certainly not least, the help section on GitHub is excellent, and should be in your bookmarks: https://help.github.com/
The original blog-post on the git-flow branching model is here: http://nvie.com/posts/a-successful-git-branching-model/