Hi people...
I am soon going to be a healer, but when I DING 80, I rather would like to start from the end when healing, so I want to start with the easist heroic dungeons and then continue to more difficult heroic dungeons. So make a list with the heroic dungeons in difficulty order, sp you write the easy ones first and then later to the harder ones. These are the current dungeons in WotLK: http://wotlkwiki.info/index.php/Dungeons
EDIT: Make it from a healers point of view