Stop Cast Counterspell (VERY useful)
#showtooltip Counterspell
/stopcasting
/cast Counterspell
Mouse Over CS
#showtooltip Counterspell
/cast [target=mouseover, harm][harm] Counterspell
Focus CS
#showtooltip [target=focus,harm] [] Counterspell
/stopcasting
/clearfocus [modifier:shift][target=focus,dead][target=focus,noexists]
/focus [target=focus,noexists]
/cast [target=focus] Counterspell
Focus Polymorph
#showtooltip [target=focus,harm] [] Polymorph
/stopcasting
/clearfocus [modifier:shift][target=focus,dead][target=focus,noexists]
/focus [target=focus,noexists]
/cast [target=focus] Polymorph
And a really awesome macro if you're an Orc or Troll
#showtooltip
/cast [Shift Click Insert Racial Here]
/cast Lifeblood(Rank 4)