I've bought a book Ultra-Distance Cycling. I like it. It says things like 'Because you are able to ride distances most find incomprehensible, you get to see a significant amount of an area in a very short space of time. You become more than simply an athlete; you also become an aesthete, attuned to the beauty of the world around you.'
Later one of the authors says 'I had become extremely good at riding slowly. I learned to ride a very long way on insufficient food and often ended up feeling sick'. This is exactly how I'm performing at present. I'm working through their nutrition and training advice, but wonder what works for you and how you learned to ride a long way fast.