Some principles of passive solar heating
http://www.energysavers.gov/your_home/designing_remodeling/index.cfm/mytopic=10270
Do it yourself solar projects of all kinds
Some priciples of passive solar cooling
http://www.energysavers.gov/your_home/designing_remodeling/index.cfm/mytopic=10340
Do-it-yourself passive solar cooling projects
http://www.care2.com/greenliving/keep-house-cool-23-tips.html
http://www.builditsolar.com/Projects/Cooling/passive_cooling.htm#Passive
Keeping food cold without refrigeration
Zeer pot “refrigerator”
http://www.buildingwithawareness.com/blog/2008/12/keeping-food-cool-without-electricity/
http://agreenliving.net/cooling-food-without-electricity/
Here are some more ideas
http://www.associatedcontent.com/article/874381/refrigerating_food_without_electricity.html?cat=15
If you live in a colder climate, are handy and understand refrigeration principles, you might take a look at what this guy did
http://fourmileisland.com/IceBox.htm
Solar cooking
http://www.solarcooking.org/plans/default.htm
http://www.knowledgehound.com/topics/solarcoo.htm#building (also articles on homemade solar food dryers)
And here are a couple of articles (thanks, graveday) about a solar icemaker. Again, if you understand refrigeration, you could probably cobble together something similar from salvage.
http://www.energy-concepts.com/isaac/
http://greenupgrader.com/3680/solar-ice-maker-no-moving-parts-no-electricity/
Do it yourself camping stoves
http://wings.interfree.it/html/main.html
http://zenstoves.net/Stoves.htm
Do it yourself composting toilets
http://humanurehandbook.com/contents.html
http://www.surferswithoutborders.org/Ecological_Sanitation.html
http://www.knowledgehound.com/topics/watercon.htm (Section on “Waterless Loos” about halfway down the page)
I put a link to this handy little portable sink in the water supply section, but if you had to set up a “warm room”, you could put a sawdust toilet and one of these in the corner of the room, enclosed by screens or curtains, and have a fairly private place where you could toilet and a sink for handwashing, toothbrushing, even a sponge bath where it’s warm. (My gratitude to a doomer friend, spacecase, for this neat idea.)
http://spacecase0.blogspot.com/2009/08/mobile-kitchen-cart-with-sink-water.html