How to terrace a slope?

@rhinoboy (2129)
December 6, 2006 5:08am CST
I have a steep slope in my garden and it is useless for anything. I would like to build walls to make the slope into 3 terraces but worried of walls collapsing. I can't afford to have them done by a builder but could save up for materials (bricks and concrete etc). Have you done anything like this? What problems did you encounter and how did you solve them? What tips can you give me for making walls to hold up a metre of soil (about 3 feet each wall). I will also need to build steps and would like to build in a Koi pond. Does this make things much harder?