Handlebars, most of the time. 2 full-sized U-locks. Caveat-- although I've been doing it for years without a problem, if you try it, your handlebars will snap off from the stress of the locks banging about about 3 seconds after the U-lock accidentally shifts and locks up the steerer against the head-tube causing you to crash (or so I'm told, repeatedly.)
back pocket.... or check out Fabric Horse. I dont remember their website address but you can get all the same information off of their myspace.. and I think it has a link to their website. Check it out!