A few good sources of information

 Here are a few useful links. Many are quite vast libraries.


http://soilandhealth.org/  
This contains a large library of downloadable books that I've found of use from soil management to herbal medicine.
 
http://www.swsbm.com/homepage/
Large materia medica library has a lot of late 19th century herbal medicine books.
 
http://www.agroforestry.co.uk/


A good source of agroforestry plants. I use them a lot.

 
http://www.motherearthnews.com/
Very good library of practical solutions to things.

http://journeytoforever.org/
Good self sufficiency library

http://www.pfaf.org/index.php
Online encyclopaedia of useful plants with cultivation details and uses. Over 7000 species listed.
 
http://www.rhs.org.uk/Gardening/calendar/
Essential reading for new gardeners and useful for old hands.
 
http://permaculture.org.uk/
Good for networking
 
http://carolynbaker.net/site/component/option,com_frontpage/Itemid,1/
I subscribed to this woman's mailing list she talks about the state of the world and transition.
 
http://sharonastyk.com/
I like this woman's writing she talks a lot about self sufficiency.