Firemaking! Oh wait... (If its not been said) Chair Sitting! At level 1 you can sit in a normal chair. At level 15 Oak. At 40 Teak. 50 Mahogany. 70 Dragon Chairs. 5M for one 99 Crystal chairs. 50M for one, no use. To get exp you need to stay sat on a chair. However all chairs break when sat on, thus impossible to gain exp.