List of realistic materials?

I am making textures with blender some times.
But it is quite hard to make a non-metal material for me.
Is there some kind of list of material settings for creating something that looks real.
Like this:
Varnish: Hardness: ???, Specular: ???, reflect: ??? etc.
Wood: Woodtexture with these colors: ??? etc.
Plastic: Hardness: ???, Specular: ???, reflect: ??? etc.
Something like this.

Try these sites:
http://www.centralsource.com/blender/effects.htm
http://www.geocities.com/pollythesheep/matlib_index.html
http://www-users.cs.umn.edu/~mein/blender/plugins/texture.html