and I suppose good advice can always bear a bit of repetition.
I use the M25 fairly regularly, and every time I do I'm reminded of how close to an horrific accident we all are on these roads. Not a day passes that I don't see at least one looney who thinks the way to get where he's going (it's always a he) is to travel fast and weave in and out of the lanes, using the gaps which other, sensible drivers have left between their vehicles. Otherwise, another variety of looney travels about six feet from the back of your car, so you get that unpleasant sensation of being 'pushed'. It only takes a split second for that mix to turn into an accident, and I see them often.
All of these people would tell you they are 'real' drivers - experts, some of them would claim - but in fact they're mostly fools who haven't a clue how to drive in heavy, fast-moving traffic. The secret is to do exactly what the title of your thread says.......drive steadily. You'll truly be able to claim to be a 'real' driver, and you'll stand a better chance of being alive to do the claiming.