A Bit More Than Basic Bicycle Maintenance for the Average Cyclist , at the How to Fix Bikes Sheldon Brown's site has articles on many aspects of bike maintenance The Park Tool website has instructions for most basic repair operations, and their handy bike map is great when you don't know a headset from a handlebar.
Bicycle Tutor has videos demonstrating many repair jobs Beachbike's Youtube channel has a lot of information specific to beach cruisers.
The videos on internally geared hubs are helpful and clear.
bicycles.stackexchange.com/users/8/Goodbye Stack Exchange
These two books came highly recommended to me, and together they cover about every bike part your bike may have.
(The road bike book doesn't cover "V" style brakes, since they're considered mountain bike parts).
Zinn and the Art of Road Bike Maintenance Zinn and the Art of Mountain Bike Maintenance
bicycles.stackexchange.com/users/28/Jared Harley
I'd recommend Park Tool's Big Blue Book of Bike Repair .
Plenty of pictures and good explanations.
This book has made a number of things seem a lot less intimidating.
(Moved over from a duplicate question.
I can't vote on comments yet, or I'd just +1 to Gabe .)
bicycles.stackexchange.com/users/273/Mr. Palomar
This one is pretty good: T
he Bicycling guide to complete bicycle maintenance & repair : for road & mountain bikes / Todd Downs.
( 6th edition out soon)
I personally have Zinn and the Art of Road Bike Maintenance as mentioned above.
bicycles.stackexchange.com/users/None/
I use a combination of: The Haynes Bike Book which is like a standard Haynes Manual but for bikes.
The Complete Do It Yourself Bike Book by Mel Allwood
The Internet Between them the two books tend to give me a thorough step by step breakdown of what needs to be done and what tools I might require, whilst the internet just pads this out (and can occasionally be either difficult to search or confusing with it's results).
bicycles.stackexchange.com/users/79/Amos
This website if you've got a more specific question about which bit of your bike you want to maintain!
bicycles.stackexchange.com/users/472/Scott Langham
Look for courses at your local bike store.
In the UK Edinburgh bike coop do excellent basic and more advanced course, as do MEC in Canada - both also do women only courses.
Most local bike advocacy groups will do something similar, sometimes it's helpful to see how to do it.
bicycles.stackexchange.com/users/427/mgb
If we're sticking with websites, I also like Thomas Driemeyer's site .
bicycles.stackexchange.com/users/1058/outsideblasts
I also use Todd Downs "Bicycle Maintnenance & Repair" book as it has great pictures and really explains things well.
bicycles.stackexchange.com/users/5256/Paul
If there is a good book what would it be? I'm pretty sure I can find stuff on YouTube (any particular user?).  Any blogs out there?
Where to find good bicycle maintenance info?
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<maintenance><resource>
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bicycles.stackexchange.com/users/105/milesmeow
Numerous books and websites are available providing information and guidance on bike maintenance. Websites include Sheldon Brown's site, Thomas Driemeyer's site, Bicycle Tutor. Many books are also available including Zinn and the Art of Road Bike Maintenance,  Zinn and the Art of Mountain Bike Maintenance and the Complete Do It Yourself Bike Book. Local bike stores also run courses. You can find maintenance information mostly online. There are many websites, forums and video tutorials readily available. It is a good idea to advise books and manuals, which might be more illustrative and explanatory. You could also try taking courses at a bike store. 
You can find maintenance information mostly online. There are many websites, forums and video tutorials readily available. It is a good idea to advise books and manuals, which might be more illustrative and explanatory. Try taking courses at a bike store. 