gift wrapping. use a pretty handkerchief, bandana, scarf or tea towel for smaller gifts like books instead of paper that will just be thrown away. Can also use a handkerchief or bandana in a gift bag instead of tissue paper.
Cloth wrapping instead of traditional wrapping paper. I've always used squares of fabric (pinked edges) and scarves. Sometimes I'd even sew simple cloth bags. Some have been around for years and years!