General Advice is available from various sources on the Internet, the following is a good source of advice for riders of all abilities
The main London Cyclists advice is available at http://lcc.org.uk/pages/advice
Why Cycle is a good site for impartial advice at http://www.whycycle.co.uk/
Cycling Tips and advice are available at http://www.cyclingadvice.co.uk/ and also at Cycle.org.uk
For road cycling go to http://www.road-bike.co.uk/
For general advice on all things cycling then go to British Cycling
For those thinking of doing some cycling in America, here is a link to some great biking tips from Portland, Oregan and here is a guide to cycling from San Clemente, California.
Here is a useful beginners’ guide.