Don't "force" drifts. The set-up of the car is also VERY important. The steering servo should be a fast one - at least .10 transit speed or faster. That makes initiating drifts and controlling them easier. Power should be applied smoothly and slowly.


The most important thing to remember is, not to force drifts. Drifting is a very fine tuned style of driving, where small mistakes will look bad, and make your drifts look sloppy. Practice drifting in a circle. Practice until you can make near-perfect circles, time after time. Use something like a coke can to drift around.
Once you feel comfortable that you can do circles consistently, graduate to figure eights. Practice here is the key. If you get tired, take a break. You might be able to drift what you believe to be fantastic one day, and can't drift the way you want, the next, so it's not something that you should expect will be an everyday thing. If you find you aren't doing drifts well, put the transmitter down and try again the next day. Don't get frustrated if you can't learn as fast as you want. It takes a while to become proficient. I have been at it for seven years, and am no "expert."

Just be patient.