Using Subversion to Maintain your Configuration Files
I got this tip from Jerry Jackson who told me about storing all of my configuration files, like .bash_profile or .vimrc, in an etc directory inside of my home directory. Once the files are in that directory, you could create a subversion repository; and inside of this repository, put the etc directory in that. Once the files are in a repository, you can check out that repository on any machine. Now you have a way to keep all of your config files easily in sync.