The quests in Oblivion include those that must be done in order, (quest-lines), and those that stand alone, such as the Daedric and Wilderness quests, which can be done in any order. Some of these have other requirements, however, such as having a minimum level as almost all Daedric shrines require the Hero to be a specific level. It also may be in the best interest to start a quest, but not finish it if a quest item that may be lost or changed upon completion of the quest is useful.