One thing I tend to advise is STAY LOOSE.
You can react more easily to the plums that suddenly jump out at you. If you just start leaning forward and resting on ur wrists (boredom, sore back) or are tense u don't have full maneuverability.
I also tend to gently swerve around in between the lanes where it's wide enough, especially at night (commuted into/outof london on a13 last summer and during the first part of winter.) Cagers are more likely to notice something moving left/right or flickering in their mirrors rather than just a blob that slowly gets bigger.
I'm somewhat dubious on the 'full beam' headlights approach though.