manage your quest.. if you are lvl 20.. dont do all quest below 20.. look for lvl 20 quests.. if you find a lvl 15 quest.. save it for next class.

do leves, guildhests, fates dungeons... the amount of XP given away in this game is so much there is no reason you should reset regular quests. also this is not angry birds.. its an RPG. quest done, story told... unless the npcs all suffer for amnesia, it kills immersion.. and in before "not everyone cares about immersion" well if you dont care about immersion then RPG (key words ROLE PLAYING ) MMOs should not be your thing.