How can I get a smoother ride?

I just bought an 07LMM 2500HD. I love the truck! However, the reason I bought the truck was because 1) I wanted a pick-up and 2) I wanted a diesel so I can run bio. I may do some minor towing (u-huals, smaller boats, etc) over the years, but don't anticipate doing any heavy duty towing. given that these trucks are built to tow they ride a bit rough on the road. any suggestions for making the truck a bit smoother and more comfortable for every day driving? thanks in advance for your help

Skite