With the new patch coming out soon, a post at WoW Insider.com asks if the daily quests are leaving casuals behind. I left a long comment, but thought I would explain my daily questing rationale.
To begin, I usually log out in Shattrath - mainly due to the fact that I can port for free back there and then just start whatever I need when I log on and I can usually sell some enchants while standing around at the start or end of the day.
Since I'm in Shattrath, I'll pick up the daily cooking quest and check the daily battleground. If it's AV, I'll queue. If not, I'll evaluate my options based on the daily cooking quest.
If it's Kaliri Stew, I head to Skettis to get a Kaliri Wing while bombing and searching for the prisoner. If I don't find the prisoner while bombing, I don't do the escort quest. If it's Demon Broiled Surprise, I'll head to Skettis and do the bombing run and look for the prisoner. After bombing, I'll then take a free ride to Blade's Edge and finish the cooking quest while doing the four daily quests there. If the quest is Spiritual Soup, I'll again head to Skettis and bomb while searchinging for the prisoner and then head to Netherwing Ledge. While there, I'll pick up the quest to disrupt the twilight portal. I'll then head to Nagrand and cook up the soup and kill the 20 agents.
With Skettis finished and Blade's Edge done in one, I'll then head back to the Netherwing Ledge as the most money can be made there. I'll pick up all the daily quests there then head directly into the mine. Doing the two quests in there are the best way to start your farming - awarding 30g for a relatively small time requirement. Plus, the greys that drop from the mobs there usually vendor at the end for 4-5 more gold. Add to that the mobs frequently drop greens, blues, and I've also seen two purple BOE's (one pair of Leggings of Beast Mastery I found sold for 1000g on auction).
After that, it's a toss up as to what to do next. I might fly around a bit and booterang some mobs, if I haven't done Blade's Edge dailies, I might fly up there and complete those. More often than not, I'll gather Netherwing Relics as the mobs that drop them also supply me with netherweave or I'll head up to Netherstorm to collect mana berries if that is he daily cooking quest.
But once the Sunwell Plateau is opened to visitors, I will be spending the bulk of my time there working on rep and earning money through dailies.