I have just read this thread with interest. As a grower for over 20 years I still learn something new every day and am pleased to do so.
(the-gnole) - I have tried the Square Foot Gardening Method as in Square Foot Gardening: A New Way to Garden in Less Space with Less Work by Mel Bartholomew (1 May 2005). There are now newer versions. It worked for me at the time. I found it very easy to manage and decided it was the best method for smaller growing spaces that I have ever tried.
(Big Fat Bill, Mongrel and Carrot Cruncher) Seeds, the only ones for me now are also sourced from the real seed company. This is because I feel it SO important to practice the skills of growing AND self seed saving. The seed saving bit I knew very little about until I started doing it 2 years ago. I get good crops but I have an unheated Polytunnel that assists the process no end. The covered growing space being the best move I had made so far......until..... I was introduced to Permaculture.
Now all my energies go into planting and growing things that are useful and have very little input of energy (from me) to get a useful item from them (food, plant ties, firewood, building materials, etc). It takes time to adjust in method and get established but I feel it is worth it in the long run. On a very basic level, the growing part, can likened to replacing Community Trees (beside the road, in parks, etc) with Fruit Trees that are useful to us all.
One of the reference books that I use regularly is Creating A Forest Garden (
http://www.amazon.co.uk/Creating-Forest ... 1900322625)
I am a member of the Permaculture Association (
http://www.permaculture.org.uk/) Well worth looking at for sustainable living and ways of preparing for the future. Right down to how to build your own compost loo. I have been enjoying learning about the Permaculture Principles and I feel they are closely linked to all the skills needed to being a prepared for anything. I have been fortunate also to have now visited a dozen or more communities living this way and shared skills with them.