What is the best wow gold makeing guide out?

i now have 2 level 80's, on my dk i have maxed enchanting/mineing, on my hunter i have maxed jc with 51 epic cuts and maxed skinning. im considering dropping skinning and takeing up leatherworking, but then my problem will be buying the materials,which is getting pretty expensive. the most gold ive had so far is about 7k, currently im back down to 400. tired of makeing chump change,and wanting to make decent amount of gold in the game.any good guides out there,that is not full of useless information?.