About two years ago, a change in work caused me to become a heavy git user. One of the most important changes I made to my bash setup was to change my prompt to multi line, detect whether I was in a git repo, include the branch in the prompt, and also include a summary of git status.

Very handy! (The check also makes sure I am in the repo part of the repo, and not, say, in its .git folder or other non-working folders.)