A couple that helped me but didn't show in available were the Monster Card bonus quest (once you collect 5 cards, it's put in progress. Talk to Tienk to complete it) and the iTCG information (show John Barricade set 1-2 items and you complete a quest immediately - you could borrow these, since he doesn't take them)
I also compared my Completed tab to the Quest Whore thread, sections where there's a big difference means more quests available.
I also compared my Completed tab to the Quest Whore thread, sections where there's a big difference means more quests available.