Day 4: A New Skill
There is a neat series by the eco-samurai learning to make them on her blog, though you can see a pdf of full instructions here by someone else. Zenrinkan also made a good tutorial blog for making these.
These would be a great alternative to my Fibertrend clogs I wear all winter but for the summer! And it is like recycling but for fabric. Even if you didn't have anything at home to make these out of, a thrift store could be a great source of fabric.