I'm a fan of framed bathroom mirrors. Where I live, in houses that I can afford, builders tend to just put in plain borderless mirrors in every bathroom. So framing the mirrors is something I've wanted to learn how to do. Of course I could pay someone else five times as much to do it for me, but why do that when I know is totally do-able myself? (Or at least do-able for my hubby, if I can convince him to do it).
Show & Tell on custom framing your bathroom mirrors. Basically, you take some crown molding and/or baseboard trim, measure it, miter cut it, paint the back, and glue it on with liquid nail. Then fill in the gaps with dry-dex and caulk, paint it, and you're done! But there's a more thorough explanation and details over at Show & Tell.