Steps I should do next time I set up a development computer:

Install these packages:
Command line tool : git-core
GUI: gitk, gitg, giggle, git-cola
Nice mergetool: kdiff3

Configure name and email address
git config --global user.name 'MyName'
git config --global user.email 'My(AT)EmailAddress'

Eclipse-Plugin
A plugin for Eclipse is available from JGit Homepage or directly from Update-Site
Activate plugin for imported project:
Team->Share Project -> Git -> Next -> Finish

Shortcuts for often used commands
git config --global alias.st 'status'
git config --global alias.ci 'commit'
git config --global alias.co 'checkout'
git config --global alias.df 'diff'
git config --global alias.lg 'log -p'
git config --global alias.br 'branch'

Colored display of branch (in one line)
export PS1='\[\033[00;32m\]\u\[\033[01m\]@\[\033[00;36m\]\h\[\033[01m\]:
\[\033[00;35m\]\w\[\033[00m\]\[\033[01;33m\]`git branch 2>/dev/null|cut -f2 -
d\* -s`\[\033[00m\]\$ '

oder http://gist.github.com/29138