i'm not sure when or where i picked up this tidbit of secret knowledge for driving, but i did. really, it comes in handy every day, especially if you drive on the freeway. here it is:
you can take your foot off the accelerator (gas) without putting it on the brake.
i know, it's shocking, but true. in fact, your car will slow a little when you perform this maneuver, allowing you to create some distance between you and the car in front of you without causing the people behind you to apply their brakes.
i especially recommend the safe application of this secret technique during rush hour or evening traffic when people seem to be much more prone to reactionary over-braking.