AND MAKE SURE THAT THE SUN TOUCHES AN INSIDE WALL,this way the wall absorbs the heat in the day and releases it at night,have this wall a dark colour so that it absorbs the most and does not reflect the heat

check permaculture there are a lot of design tips and i will give you the sales pitch

am an Permaculture Environmental Designer and consultant.

the designers manual by Bil Mollison cost about 40 dollars.
and is the best all round book you can get.(tagiari publishing)

Permaculture means permanent agriculture
a concept put forward by Bill Mollisson in the 60`s
which is a complete hand book for environmental design.
for those who seek an ambiotic relationship with our planet
With practical solutions for energy systems ,infratructure ,housing,
animal shelter ,water systems and sustainable agricultural practises.
With the world and it`s history as it`s source
From the chinampas of Mexico to the teraced gardens of the Andes.
From the dessert whadis to the steppes of Russia.
Covering all climatic conditions temporal, dessert, humid and dry tropics.
with chapters on soil ,Water harvesting and land design,
Earth working ,Spirals in nature,Trees and water ,utilising energy flows,
Strategy for an alternative nation

this book also has many gardening tips,bio-gas,companion planting and ideas for structures ,how to cool down houses in hot climates ,how to warm up houses in cold climates with out using technology but rather by design.

always aiming at autosuficiency and sustainability .
this can all be found in the designers manual by Bill Mollisson

Collectively portraying an ancient and natural philosiphy
With the Laws of Nature as its base
coupled to the present day level of scientific knowledge.

Permaculture is well known and you can find many references on the web.
there is a University of Permaculture in Australia

some other writers that are on the internet are
david Holmgren
Larry Santoyo
Kirk Hanson
Masanobu Fukuoka
Simon Henderson
and Bill Molisson.

a representitive of the concept in USA is
Dan Hemenway at

i got a yahoo 360 which has some stuff in English as well as this spaces

We planted trees on the east side to block morning sun from blazing into our bedroom window. Since the sun travels along the back (south side) of the house, we put in a patio cover with trees planted on either side to block the sun during the heat of the afternoon. We have few windows on the west side of the house, but since we wanted to combat radiant heat, we planted a large pine tree right where the sun hoovers until it sets. We also tinted all of our windows which really helps keep the heat out.

In hot environments, you’d want to expose as little of the home to the sun as possible, but in cold environments, just the opposite.

And then, you might want to make provisions to compensate for seasonal differences.

In the cold environments, thick bushes and trees are planted on the north side of the home to break northernly winds that might further cool the home. In hotter environments, having tall, deciduous shade trees on the South side will shade the home in summer, but allow heat from the sun to protude in winter.

In moderate climates where you might want winter heating, you might have a glass wall (trombe wall) facing South for winter heat gain, but in the summer, you’d absolutely have to either shade, reflect, or otherwise eliminate or isolate the heat away from the dwelling. A really energy efficient design in moderate to colder climates is to bury the home underground on a south-facing slope where the glass can be exposed to the south side in winter and shaded from the sun in summer.