Ctrl+F9 hides your UI, although I reset that to Alt+F9 and put 'Drones Return to Orbit' as Ctrl+F9.
Holding Ctrl+Alt then repeatedly hitting Del does not reboot Windows anymore - much to my disgust.
Shift+dragging turrets/bays ontop of eachother groups them. Whether in fitting screen or by the circle thingy.
Shift+dragging the edge of probes resizes them all. At the same time.
Shift+dragging the arrows of probes moves them all. At the same time.
Hitting the triangle at the bottom of the speed indicator (right-hand side), you get an option to show 'readout' or amount of shield/armor/hull you have left. You get 2 chioces: absolute - HP number; or percentage - umm, percentage. Duh.
The Comet - no matter how epic it is - cannot solo a well-fit BC or BS. It just wont happen, sorry.