Need some lens hoods? Paul Mutton has provided free lens hoods at his website. The site offers PDF documents that can be printed and cut out to make lens hoods for a variety of 35mm and digital SLR camera lenses. These hoods are not just free but they even fold back up to make them easier to carry around.
What you need to do is just look up your Canon, Nikon, Olympus, Pentax, Sigma, Tamron, or Tokina lens, then download and open the PDF documents available, print it out at 100% size, cut and curled it up to form a circular hood shape and slap it on.
See also: Photography Hacks