Here are just a few i use they are mostly just to clear up abilities that would take 2-3 keybinds and make them into 1.
Of course fear( even though we all know everyone's mother, brother jack, uncle larry, and sister sue will either dispel it or get dispelled/be immune for about 90% of the time and on the slight chance you get one off it'll be trinketed, but still is useful in heroics as well.)
#showtooltip Fear
/cast [mod:shift,target=focus] Fear; Fear;
And just a few pet macros for pet management of course, and some focus tongues/weakness/coil. I was getting some message saying couldnt post links without more posts more macros inc feel free to ask anything.