We've all lost it. Our remote that is. And we really wouldn't have an excuse if we had this in our homes.
This remote control holder, designed by Gary Bugno of Philadelphia University, explicitly defines its use by the large, bold text "remote" that creates the enclosure.
Easy to spot if the remote has been put away after use, but the problem (as with all remote control holders) is getting ourselves to actually put the remote away. Maybe this screaming "remote" at you as you leave the room will be enough of a reminder.