Take your jacket off before you get to the head of the line, have your laptop out of your bag and ready to put in a tray and get through security as fast as you can so that the rest of us lining up behind you don't have to wait for hours. Having spent far too much of my life standing in security lines I'm convinced that at least fifty percent of the hold ups are caused by pax who can't seem to understand a few simple rules to speed things up.
Then again, I've got to pass through CDG tomorrow morning and I'm feeling grumpy about it already, so I may not be entirely unbiased.