One of the best things I've done to improve is to practice the same section over and over again. We all tend to just ride, but find a section that's a little challenging, or maybe just a section you really enjoy, and then double back to practice that part repeatedly. Try different lines and techniques, a little more or less speed, different gearing, etc. In other words, practice.
I'm not saying spend an hour on one section, but maybe repeat a section a 5 or 6 times until you really nail it.