For the The Relic's Emanation quest I used the Ogrilazy addon to ease stuff, but still, is a pretty good memory exercise in there.
Kind of left out the most fun parts, farming for ammo crate recipe and enchanting recipe... probably others as well.
The apexis shards were also useful to refill Depleted Crystal Focus, creating Charged Crystal Focus, which didn't share cooldown with HP potions. When I was running level-appropriate through BC and grinding Skyguard rep, I had a hotkey macro that used a refilled crystal and a HP pot together. Unfortunately, I never got to BC content when Shartuul was still active. I always wondered what that thing was for.
I came into wow for Wrack of the LichKing (So the dailies were actually made easier and the rep grind was faster... you have my sympathy Burning Crusaders). when reputation grinding, I enjoyed doing Ogrila, and then returning on Wintersday for Fa-la-la-la-Ogri'la.
when you say it I recon that o.O