Here are two videos by a Russian bloke that I thought were great tips. Both have subtitles in various languages and the Google translate is worth a read by itself! :lol:
https://www.youtube.com/watch?v=lEVIsf92s4o
https://www.youtube.com/watch?v=9dpdgMfEp4w
The tip about making a PET bottle smooth is a great one for anyone who wants to make string/tape from it succh as in this video:
https://www.youtube.com/watch?v=GSBh77bjz_Q
