Put the remaining count, or count completed in the daily quests title when looking at it in the NPC dialogue, like "Kill 100 mobs in Illusion Vampire (15)", where the 15 means you have 15 left. OR "Kill 100 mobs in Illusion Vampire (7)", where the 7 is how many times you've completed that quest (probably this way since you can do it more than 15 times, you just don't get the item rewards for it anymore).
Along the same line, I see a lot of players every week looking for a GM to tell them where they are in their main story line quests. Usually the answer is to look at what quests you have left and try to match them against the guide, but wouldn't it be awesome if there was a command or NPC that just said "you are currently on XYZ quest of the story line"?