This is one just for the Arch-lovers out there. The de facto package manager, pacman, is pretty fantastic already. Let's make it even better.
Step 1) Open "/etc/pacman.conf".
Step 2) In the "# Misc options", remove the "#" from in front of "Color".
Step 3) Add "ILoveCandy".
Now the progress for installing new packages, in pacman, will include a little tiny Pac-Man. Which should really just be the default anyway.