Has anyone mentioned bringing a baggie to put all your scanned items in so all you have to do is drop it in the tub, step through the detector, grab the baggie on the other side and keep on moving? Don't stop to put things back in your pockets until you have made it to the rotunda or up the stairs.
Also, if you're a marshall at a security site or just waiting your turn and there seems to be someone in line that's not with our group and acting a little "anxious" about the wait, you might want to invite them to step to the front of the line to go through. There were a few folks last year concerned at making a "hearing" that were at the back of the line. We moved them to the front, they were very appreciative, the securtiy folks were impressed and we improved our stature in those folks' eyes.