Load and start track A. Load, and start track B on the next down beat. Adjust pitch / speed of track B to keep in time with track A. Now you know the very basics of DJing, you might want some hardware to practice it on. Fortunately, for you beginners, Denon has just released the MC2000 DJ controller. An entry-level device that should get you (and your tracks) up to speed. Along with the plug and play USB device, you'll get a copy of Serato's DJ Intro mixing software (for which it was specifically designed) to get you started. If that's not for y