Katie asks: "My rental apt has pull-down shades. The problem is it's either privacy OR light, can't have both. I would love to install blinds but cannot afford to do whole new window treatments. Any suggestions?"
Katie, window film, aka privacy film, gives you privacy while still allowing light to come in. It's fairly easy to install and inexpensive. It comes in various sizes so measure your windows and get the size that will give you least amount of waste. It also comes in different styles though I prefer the 'frosted' kind, as pictured above, for it's simplicity.
It's also good for shower stalls with clear glass doors so two people can comfortably use the bathroom at the same time.