I never repeat the same piece twice, but I do create patterns for some of my pieces so that other people can create their own interpretation. I feel it's vital to encourage people to be creative, and try to support this process whenever possible.
Nature and the environment is really important to me, so I try to ensure that I recycle and re-use extensively. I avoid using art/craft products which are chemical/petroleum based, or may be harmful to the environment. Natural is always best as far as I'm concerned. The packaging I use is also recycled whenever possible.