Hi
I'm with Mike on the Spyder Pro 2 investment - if you take your photography seriously then you have to calibrate your monitor to ensure that you're working to industry colour management standards. Shooting in RAW and using a good post RAW conversion package can provide you with loads of contrast and saturation adjustment. However the wrong light can rob the best subject and composition of any impact.
Good luck
Adam
www.adamcoupe.com/portfolio