How do I make fast money on RuneScape?

I'm really desperate for money on RuneScape. Can you PLEASE PLEASE PLEASE give me some tips? I've been mining Gem rocks in Shilo but that's crap money. Sometimes I cut magics and yews but I find it too long. My wc is 77. My combat is 92 on ftp, 94 on mems. My Mining is 56, Smithing: 39, Slayer: 40, Crafting: 48, Fishing: 55, Fletching: 39. Those are skills that you might suggest making money from so I told you my level in them. Can you please give me some ways to make fast cash?