If you search for quest markers via your map or compass, yellow circles with an exclamation mark in it, go there and speak to the quest givers. Most of them are fetch quest and some or races. In order to get this achievement, you have to accept the quests to clear the village from monsters. They appear in certain spots, marked with a blue circle with shield and swords in it. Kill the mob, head to your quest giver and claim your reward. You should do all the quests, in order for them to renew.