Jun 25th: This is one of the best pieces of technical writing I've seen - an implementation of (some of) Git in JavaScript, with a very well written inline description of what's going on.
On a slightly nerdier bent, this explanation of the packfile format is pretty great too.
I'm closing out some 2014 tabs, so have a few useful links.
Want to make a game, but don't know how to get started? Sortingh.at is a great step-by-step resource.
Using Google Apps-for-business and group mail is bouncing? Follow these instructions to switch to "proper" groups.
Think you can recognize your developers from their commit messages? git-game turns it into a neat game where you try to figure out whose entire message was just "fuck" the most often.
Want a machine that make tortillas at the press of a button? I DO. flatev is the answer.
Oct 26th: Every time I get the message "To prevent you from losing history, non-fast-forward updates were rejected" I have forgetten how to fix it (in the normal case). Yet another guide to simple rebasing in git. This shit is way too complicated.
Sep 26th: I've been meaning to link to this for a while: Deploying at GitHub explains the develop/stage/deploy cycle at github, which can rougly be described as "Like Flickr, but with personal dev environments and using Git". It's light on technical details, but says a lot of the right things.
Jul 23rd: git-up seems to be the Git tool I had been missing - fetch, stash, rebase, unstash for all branches.
there are plenty of tips for removing files from a git repo history, but this method of just replacing the string is waaay better
a simple guide to undoing operations in git
git submodules are like svn externals, but with the added benefit of being almost impossible to remove