This method is simple, and obvious. DE all your greens and instead of saving the dusts, etc., sell them on the AH for as much as you can NOW. Don't save them for enchants (unless you need it right as soon as you DE). The reason being, prices are still high for enchanting mats, but will be going down over time. I know this is obvious, but most people still insist on saving their DE mats. I made over 3000g DEing the greens I got from 78-80.