Here's an awesome tip from amib over on WoW LJ. Sometimes, we all could use a little location check from time to time. While I usually am OK with finding quest coordinates, every once in a while, I'd just kind of like to know where I am. So here's amib's tip-- a macro that will easily and simply tell you (no addons required) where you are in game.
AddMessage(format("( %s ) %i,%i",
GetZoneText(),px *100,py *100));
(As commenters have noted, the formatting is weird here on the blog-- it's meant to be two lines, both starting with script. The other line breaks will need to be taken out.)
Just put that on a button, call it "Where am I?" or something like that, and then click it to get your current ingame coordinates in the chat channel. Considering how poor my addon-updating abilities are, that's perfect.
Of course, there are lots and lots of addons floating around that will do this even better-- showing your coordinates and cursor coordinates in the window, and all kinds of other ways. But if you only use coordinates every once in a while, and never remember to update your addons, this little macro could be pretty useful to have.