If you don't have enough Hit Rating to guarantee Righteous Defense won't miss, the only glyph that's really close to being mandatory is Righteous Defense.
Don't glyph for Consecration, it'll throw all your cooldowns off. Seal of Vengeance is a great one and helps tons with Expertise, Judgement is nice too. The only minor glyph that makes a bigish difference is Sense Undead.
I use:
Major:
Righteous Defense
Vengeance
Judgement
Minor:
The one that lowers the mana cost of Seal of Wisdom
The one for mana from LoH
Sense Undead
But hey -- glyphs are there for flavor, and unlike specs -- min/maxing with glyphs doesnt make a HUGE game-breaking difference.