It might be nice to have a collection of links to articles, tutorials and alike.
Books
http://www.galileocomputing.de/katalog/openbook - <openbook> (german)
A collection of freely available books.
Git
http://nvie.com/posts/a-successful-git-branching-model/ - A successful Git branching model
This article describes a model for handling branches in git. The model is used for the pyMolDyn repository and works quite well; it is much better than everybody working in the master branch.
Tutorials
http://zetcode.com/ - ZetCode
This website provides easy to understand tutorials for modern-day technologies.