Enabling color "ls" on Mac OS X

In ~/.bashrc, add:

export CLICOLOR=1

And if you don't have it already, add to ~/.bash_profile:

if [ -f ~/.bashrc ]; then
        source ~/.bashrc
fi

Sometimes, it's the little things that you're used to seeing that make you feel at $HOME.

Setting the Mac OS X hostname

I know you can set the hostname in Preferences > Sharing > Computer Name, but it gets overwritten if you're on a foreign DHCP network that has hostnames assign. To prevent that from happening:

sudo scutil --set HostName {custom_hostname}

Found on this superuser.com thread.