I've often used the partially opened blade trick as well, although it's probably a good idea to practice on scrap first if you're not used to the technique!
I have a pair of scissors with the notches as well, although I've only ever tried using them a time or two and always reverted to my usual methods (blades or strippers).
Using less than a 360-degree wrap was always recommended on the type of screw terminals we had on the old GPO telephone blocks here. It would insure a good secure connection without the risk of cutting through the conductor.
