Reset OS X Dock Icons to Defaults
There's something amazing about receiving a new MacBook Pro for me. The new machine, unaffected by sins of installs past, gives me a fresh start to mess it up all over again. Of course with a laptop from your employer you probably can't just wipe things clean -- you'd probably lose important software relevant to the organization, or it would take you forever to get it back in a state where you have all of the dependencies.
There are a few things you can do to make the Mac seem like new though. One of those is reseting the Dock to its default icons via command line:
defaults delete com.apple.dock; killall Dock
Away goes the mess of icons you've added of the years -- you can simply wipe the Dock clean and start over again. Of course the first thing I do is add Dock Separators, but to each their own...