In chapter two, after you go through the "trial" and defeat Lorne, you can return to West Harbor to complete the quest "What Happened to Lorne" (you have to have gotten the quest in Chapter One before leaving West Harbor). Talk to Lorne's mother to complete the quest, and you'll get 500 XP. She'll say she needs to be left alone. Now talk to her again. She'll give the intro to the "quest completed" dialog, and give you 500 XP again. Rinse and repeat. (Fixed in 1.03)