If Efrye's suggestion doesn't work, try going to any zones mentioned in your last Main Scenario quest in your journal and look for the Recommendations option in your menu (If you use the micro-menu, the red icons in the bottom-right of the screen, it will be an option when you click the icon that looks like a list, you will have to look for it if you use the gamepad or ps3 menu). It shows available quests in your current area and gives priority to the main story quests, the ones with the meteor icon.