Mine:

-Get a team to 80. Duh. My pally/warlock/priest team has reclaimed my love and affection and will probably be the one. They are about to ding 73 while grinding Skyguard rep in Terokkar, so the road is long.

-Equip one team with fast flyers. I got my very first ever, a druid's swift flight form, and realized that YES, epic flyers ARE worth the money! Oh god, it's night and day. So, without losing sight of the first goal, try and level early in Northrend to leave as many quests as possible for 80, sell everything, worry less about tradeskills, and the sky is barely the limit.

-Finish TBC dungeons. Including Magister's Terrace, one that I've tried countless times but have yet to multibox past Delrissia and her merry band of merry bastards. Maybe get into heroics ... but mainly just check off all the regular dungeons.