I had a lot of scrap paper lying around that had writing on one side, and nothing on the other. It seemed a shame to throw it away so I have been saving it up to make a notebook out of ... which I have now done. I used scrap bits of graph paper, plain paper, lined paper, tracing paper [i folded the tracing paper and put bits of magazine in between so that you could no longer see through it so it can be written on], old letters and fliers etc.
I folded the paper so that the writing was on the inside, and then bound them in signatures, which I then stitched together and made into a book.
Here are some pictures:
