Glyph of Shadow Dance, Glyph of Backstab, Glyph of Hemorrhage
Glyph of Garrote, Glyph of Preparation, Glyph of Blind
I personally use glyph of SnD for major, since it helps my overall sustained damage. That said, ShD would be much better for burst, which might make it better over-all. Still, I might mention SnD.
As for minor, I would strongly suggest using Glyph of Gouge. Since sub is mainly about control, being able to use Gouge whenever is very useful, especially considering you want to be behind your target for backstab and your bleeds don't break it. SS->Gouge is a pretty nice combo for quick control, and if I need to run I will often strafe away after. Using SS on, say, a warrior, can be pretty nice for fleeing in general, since they will likely not know where you are for a bit.
edit: Expose armor might also be worth mentioning. I use it instead of Eviscerate unless I am about to potentially score a kill and need the instant damage. If running with another melee, it gets even better. Of course, if there is another player who can put up the debuff said person should, since EA is a finisher and all others just cost GCDs.