I opted to earn money by training Hunter, one of Runescape's newest abilities. The basics of Hunter are easy: you put traps to catch little NPC critters and harvest their carcasses for tools. It is one of the very life sim-like abilities, and creating RS gold was pleasurable for all the small subgoals involved.
From start to finish, I spent around 20 hours searching, and by the end I had a clean cash pile to finance my questing and training. It was a long mill that took me a few days, however I liked Hunter because I used different methods and visited many areas.
I started away snaring birds at the south, then proceeded onto butterflies and hedgehog-like critters called kebbits in northern regions, until I could finally hunt little explosive raccoons called chinchompas, that can be highly prized on Runescape's auction house, the Grand Exchange. As my Hunter level increased, I needed to earn an increasing number of expertise to reach another level, so I looked forward to unlocking brand new, faster ways to train, such as moving from grey to red chinchompas.
Mastering chinchompas was especially interesting because I chose to search using a form of animation cancelling called three-ticking. I will spare you the specifics--only know that by putting in more effort and getting some timing down, you can shorten the time necessary to buy Runescape gold complete certain actions by tricking the match engine into overriding a long animation with a brief one.
Old School Runescape is still using the identical engine from 11 years ago, and also this animation suggestion is only one of several ways players've pushed it to its limits. Veteran players have figured out the way to do all kinds of things Jagex never really planned , from multiplying animations into cheesing AI.