Let's say you are working on an illustration that requires a set of tools that you use consecutively hundreds of times to get the job done. You can either learn all the shortcuts to use the keyboard to switch between them. Or you can simply tear off the required toolbox panels from the main toolbox bar and put them comfortably next to the illustration you're working on.

To do this just click on the tool of your choice on the toolbox and go to the right edge of the pop-up window. The small arrow pointing right will tear off the tool and expands it for you. You can move this mini toolbox around and save miles of cursor travel.