Since Unutterable hasn't bothered to copy/paste, I should do so in his stead!
Well, since the tank and the healer got one, I figure I'd make one for the much-maligned, often neglected off tank. This would apply equally to Conks and DTs.
1. Thou shalt honor thy raid or group leader, for an attentive off-tank is the leader's most useful servant, and an inattentive off-tank the butt of the DPS class jokes.
2. Thou shalt not sumbit to hubris and tank when there is a Main Tank present. Should thou be tanking and a Main Tank becomes available, thou shalt yield the tanking to your more turtle-like brother or sister without rancor.
3.Thou shalt always remember thy place, for it is to stand behind thy main tank and in front of thy healer. The off tank that remembers not this commandment shalt left to ponder his error as he awaits a rez.
4. Thou shalt not blow thy cooldowns save at the behest of thy group leader. Premature activation is a sin and the only just punishment is to be mocked by the women.
5. Thou shalt remember that thine is the heart of the group. Thou wilt defend thy squishy DPS brethren from the consequences of their own folly.
6. No man is an island, and no raid succeeds that does not work in concert. Therefore, thou shalt be attentive upon the words of the raid leader, and act in the very moment of his command, and not bring about the raid leader's apoplexy as he screams repeatedly to take aggro or stomp the adds.
7. Thou art a true puzzle; a dps class and a tank, a frontline trooper and a group support warrior. Therefore, thou shalt practise true balance in thy feats, so that thou might be the versatile combatant required, even at the cost of pvp divinity.
8. When tanking, thou shalt TANK. When dps'ing, thou shalt DPS. Thou shalt not perform thy assigned duties by half-measure.
9. Thou shalt not mock the tank for his lack of dps, nor the dps for their feeble squishiness, but rather thou shalt be thy dps'er's shield and thy tank's cannon.
10. Thou shalt not ever, under any circumstances, for any reason whatsoever, flee the battlefield; when the Main Tank falls and the raid dissovles into wipe, thou shalt cover the asses of thy healers as they flee for the door.