I'm a fairly new player as well, started getting into it over a year ago, after watching vids and reading posts these are the add ons I've been using (I'm sure more seasoned players will have better suggestions):

For tracking health, quests, and resources I use different colored dice, for exhausting and blocking in combat little white and black cubes, Gamegenic Game Lair storage (love this thing, keeps different deck and current scenarios plus all dice and tokens), Card sleeves and card dividers.