Wherever I left it is where I usually find it. For instance, if I want to find my cream ale, I know that I should look in the closet with the fermentation fridge. To find my IPA, I should look in the keezer.
Seriously though, I don't go commercial beer hunting. If I happen to be driving past the beer store I might go in and see if anything catches my eye, but I don't do much of the errand running anymore, so that's very rare. I did ask my wife to pick up a six pack of hoegaarden today because I've been craving it.