breaking in new rotors

I've got a 99 silverado z71 5.3L. I was having lots of bumpy braking so i took the rotors off and had them machined down. The very next day they were 10X worse. The whole front end was jumpin while i was braking. Turns out the rotors warped worse than before. I bought new rotors and installed them. They seem to be working great so far. Any tips on breaking this things in? I wanna make sure i dont warp these things like i did the rotors that had just been turned.
Also, a tip of advice for those of you with slightly warped rotors. Just get new ones. You'll save yourself a lot of time, money, and frustration.

Wagslick, I have done a bit of research for you and found this web site which is helpful in breaking in your new rotors.

http://www.zeckhausen.com/bedding_in_brakes.htm

Hope it is of some help to you... ;)

Irratic tempering is what causes rotors to warp. By gradually heat cycling rotors you allow them a chance to adjust to the hub as well as become further tempered. Rotor seasoning is best accomplished on the highway with little or light traffic. The goal of seasoning is to burn off any extra oil, as well as heat cycle the rotors. From any given speed, slowly apply the the brakes until you have lost approximately 30 mph of speed. Do not come to a stop. Instead accelerate back up to speed and maintain this speed for at least two minutes before applying the brakes again. This allows your rotors a chance to slowly cool off. Now repeat this cycle a minimum of 10 times. If possible repeat the process again after the rotors have completely cooled, about 3 hours, except this time brake faster. If you must come to a complete stop, try not to hold the brakes in any harder than necessary. Also while breaking in your rotors, avoid using the emergency brake. Your rotors will continue to temper over time as you drive your car, but you can obtain almost a complete temper in under 5 hours. Depending on your driving habits, and area, you will want to wait anywhere from 500-1000 miles before really you push the limits of your new rotors.

Found that ^ too. ;)