i use the standard 1-"=" for my first action bar, with modifiers shift, alt, and ctrl all accessing the 2nd, 3rd, and 4th bars.
1 = judgement - i drag whichever judgement I plan on using per fight down to that spot. the other judgements are accessible on my bars (usually off to the side, but in an emergency I can click it and/or drag it onto the bar).
2 = holy shield - always was, always will be...same with shield block on my warr (still 70).
3 = hammer
4 = holy shield slam
5 = hammer of justice...this changes when i go holy, but its more of a sentimental/built-into-my-head stubbornness that keeps it here.
6 = avenger's shield
shift + 5 = consecrate (again mostly out of stubbornness...its strangely natural for me nowadays to hit that...i think i kept it on the "shift" bar so I would give it a half a second to make sure I wanted to drop it back in the first days of tanking 25 mans...just in case the CC would be standing it in)
so, typical tanking rotation would be 1 4 2 3 s5 4 1 3 2 4 s5...i just get into the pattern and keep with it. if I ever lose my place or have to use a gcd for something important, i prioritize how i get back on track...holy shield for bosses, massively huge waves of mobs that are already on me, judgement then holy shield slam for more single target threat, consecrate or hammer for more aoe threat...etc
i do use jim's cooldown pulse for a nice steady pulse-sound whenever my abilities are up on cd, and it's basically constantly going off during a rotation...probably not entirely necessary but I like it for especially watching the longer (aka 2/3 minute cd) abilities.
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