The World of Warcraft Armory

OK, I have a good idea of some of the gear I should be working toward, but am unclear on what to aim for in some places, and most of all, which are likely to help me in the journey to the others.

Example: I know the Red Sword of Courage - Item - World of Warcraft - is a good target, but have had several failed attempts to get past the trophy room. My guild is tiny, basically just me and my healer. So we have to PuG these.

Things i know i need, the aforementioned sword, Essence of Gossamer - Item - World of Warcraft, and enough emblems for the T7 chest and gloves. From there i see the vast expanse that is Heroic Loot and get kinda lost.

So any advice? Any pre-heroic stuff i should pick up on my way?