Print your own lens hoods! If you own an SLR and don't have lens hoods for your lenses, they are definitely worth it to cut down on lens flare in certain situations. However, they can be surprisingly expensive. These cardboard versions are obviously not as sturdy as the real thing, but as the site points out, you can always print out another ;-). Most lens manufacturers are covered (no Minolta for you yet, shaft) with a surprising selection of lenses available.