[Glyph of Revenge] - Optional : Highly Recommended, allows you to Heroic Strike in low rage situations and replaces a high miss white attack with a low parry yellow attack for free.
[Glyph of Devastate] - Optional : However really good for initial aggro/dps and has some prot pvp uses, unfortunately it suffers from Devastates drop in value at the moment.
[Glyph of Last Stand] - Situational : There are very few fights where this would be useful. Maybe Drake/Add tanking on S+3D. By the time you go from one boss to another the normal CD would have reset anyway.
[Glyph of Taunt] - Better choices available : I rarely get resisted and even then its never in a do or die situation. This could change in Ulduar though.
[Glyph of Resonating Power] - Situational : AoE tanking glyph, probably more of a 5 man glyph. I suppose if your always going to be the OT you might choose this one but even then there are better choices considering TC's CD is more of a limitation than rage cost. Although I can see why you would use it for S+3D adds.
[Glyph of Barbaric Insults] - Situational : Not worth a major slot imo. If your having issues with taunt being on CD you can put vigilance on the guy that's getting hit a lot (ie another tank) and you can get almost unlimited taunts which is really good for add tanking on S+3D.
[Glyph of Cleaving] - Situational : AoE tanking glyph, totally useless on all boss encounters unless your on adds.
[Glyph of Heroic Strike] - Optional : Highly Recommended, It helps maintain rage when your HS spamming and it can help push out more threat in situations where you don't have infinite rage. That free Heroic strike that I got from the Revenge Glyph can actually give you 10 rage. When you heroic strike you generate no rage from the hit, so any extra rage from heroic strike is good. My heroic strike crits 30% of the time and on a full naxx clear I heroic strike just as much as I devastate but heroic strike does 30% more damage = more threat even if you account for the extra innate threat on devastate. In order to maximise threat you need to replace as many auto attacks with heroic strike as possible. 1 Heroic strike will on average generate the same amount of threat of ~2 auto attacks minumum and if its crits it jumps up to the same amount of threat of 3-4 auto attacks.
[Glyph of Sunder Armor] - Situational : Very nice glyph for add tanking and 5 mans, for bosses its useless which is why I don't use it.
It is important to make sure your choice of Glyphs are based on what your doing, my choice is Blocking, Revenge and Heroic Strike although I did really like Devastate when I was using it. I'm tanking bosses all the time and I don't have issues in 5 mans or on trash. If your new to tanking, always the OT or starting 5 man heroic farming things like Cleave, Sunder, Devastate would be useful.