A method that kills brain cells
Dude1: I'm going for 99 runecrafting.
Dude2: You made a 34 in math, what makings you think you can get 99rc?
the most time consuming skill in Runescape, sure you can make a ton of money from it. However after you reach around 50, you'll wish you kill yourself instead of training it.
getting 99 Runecrafting requires banging on your keyboard/monitor so many times that you've already destroyed it several times over