For people looking to get started in car modification the best advice is to attend one of the shows first. This will give you some ideas on what can be done and how it can be done. After that it's a question of buying some of the numerous magazines such as Max Power and Plus Bus which service the sector.
But these still leave people pretty much on their own. Perhaps the best way to get into this rapidly growing community is to log onto the www.cruiseirl.com website. While this site is not exclusively dedicated to car modifications, it has large sections of news on it, forums dedicated to it, as well as links to dedicated car modification sites.
The site is easy to navigate, allows people to get to know other enthusiasts, subscribe to free newsletters, and is particularly good for people who are taking that first few steps down the road of car customisation.