So far i've been to 10-15 practice days, finished 4th in a round of eurodrfit at Lydd in the clubman class and also finished 4th in a display comp at snetterton.
Just thought i'd try and add a bit to the drifting section with my half arsed guide to people wanting to get into what is a very new sport.
First you'll need a rwd car and crash helmet, to start off with that is all thats importent (don't worry about diffs, suspension etc).
Then goto a practice day such as the ones run by http://www.driftuk.co.uk if your very confident in you ability and have ago, if your less confident with the basic drifting straight off go for a course with http://www.driftskool.co.uk/
Now you've tried it, you know you like it so now is the time for basic mods or more depending upon your budget 8)
In order these are what i'd class as the best started mods.
A car that your not to worried about damaging and can afford to fix, think about your budget you may beable to afford a fifteen grand 500bhp supra but can you afford to keep it running in the harsh enviroment of drifting? day to day and year after year?
A 2 way diff will set you back around 500-600 pounds or a welded diff for around 50-100.
spare wheels and tyres (you'll go through alot of tyres)

Coilovers or uprated shocks and springs whilst you save for coilovers.
A bucket seat and harness (you'll be amazed how much you are thrown about inside the car).
All other suspension arms, adjustable front top mounts for the coilovers and setup.
By the time you get to this stage this guide will be well beyond you 8) 8)
Hope this is of some help to someone.