A window film is that frosty layer over glass windows that lets light in without letting everyone else's eyes in too. It is a great solution for glass in bathrooms and other areas that are exposed to lots of light. Design-wise they have come a long way. You can get funky patterns, colorful tiles, and all sorts of nature-inspired themes now. They can cost as little as $10 per sheet and are relatively easy to apply.
I sure could have used these when my apartment faced an office building. My first day there I neglected to buy curtains, and the next morning I regretted it as I stretched and yawned in front of a business audience of 12 across the courtyard. No harm done, other than my slight embarrassment, but these handy window upgrades could have saved me a lot of trouble looking for odd-shaped blinds.
Learn how to DIY at Design*Sponge!