Log Bird Feeder - 23 DIY Birdfeeders That Will Fill Your Garden With Birds (my note: I haven't looked at all of these, but at least one is a terrible idea. The window birdfeeder -- birds could fly into the glass and hurt themselves.
I love this idea, but would probably get made fun of a bit if I did it. An accountant using tape for a grocery list! Grocery List on adding machine paper from office supply store. Just tear off when you're ready to shop!