I'm not sure whether the tip should be to avoid Sutton Bank, a steep and winding section of the A170 near Thirsk, like the plague, or to make a point of seeking it out.
One thing's for sure; it's one of the most distinctive features on the UK primary road network, although I don't believe it is actually, as is sometimes claimed, the steepest UK 'A' road. It nevertheless has a fearsome reputation. HGVs regularly get stuck and caravans are banned completely.
I recently drove up Sutton Bank for the first time in a few years when traveling to North Yorkshire for the Verdict test of the Land Rover Freelander 2. I have to admit, this time around, it didn't seem anything like as hairy or dramatic as I remembered it - put that down to the torque of the Freelander's diesel, I suppose - but it's still an enjoyable drive, especially if you can get a clear run unobstructed by slow traffic. Great views from the top of Sutton Bank, as well.