-Get Rid of the Delay When Showing and Hiding the Dock

By default, the Dock has a slight delay when you mouse over it and have "Automatically Hide and Show Dock" enabled. It's a little annoying, but you can customize the speed of that animation with this command: defaults write com.apple.Dock autohide-delay -float 0 && killall Dock Now, when you mouse over the Dock, it'll appear instantly.