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 for putting posts up, for lamps, that can also be fence or divider connectors. I like hiding a sturdier metal post inside a fabricated wood post, then attaching the remainder of the fencing to it. Great for high wind areas.