It's really fairly simple, if you can't drum it into your head "grab the go bag BEFORE the socks and underwear", then have a backup bag in your car/truck. I tend to do both, my hands are full going out the door, and my vehicle looks like I'm ready for a camping trip. I occasionally get some chuckles out of friends/coworkers, but I'm always the first one they come to when they need the widget that nobody else has with them at the time too.

Troy