Tires
Drifting requires the rear tires to lose grip with the road surface, so the less grip they have, the better. The type of track you are attempting to drift your remote control car on has a large influence on the type of tires you need. Indoor or temporary tracks can be made of foam tiles, offering little grip. On foam tiles standard tires can be used for drifting; asphalt offers more grip and hard plastic tires are recommended. Special plastic covers are available that are clipped over your standard tires and are ideal for drifting.
Suspension
The recommended set up for drifting is to set the suspension soft at the front and stiff at the rear of the car. Stiffen the rear shocks by using thicker oil in the damper and smaller piston holes. For the front suspension, use thin oil and large piston holes. Set up the suspension so that the rear of the car has more travel -- this pushes more weight over the front wheels giving them more grip when the throttle is released. This also helps to maintain a skid even when there is no power at the rear wheels.
Differential
Use a locked rear differential to induce the inner rear wheel to lose grip. It does this as the wheel is prevented from turning at a slower rate and spins faster than it needs too and starts to slide. With ball differentials, loosening the front and tightening the rear helps to promote a quicker turn in to help start the drift and, again, enables the inner rear wheel to lose grip more easily.