I find that reviewing my calendar for the next few days before I set out cycling (like you, I have and hour-plus ride each day) gets my brain thinking about things. When I get to work or home, I just do a mind sweep. I cannot imagine interrupting the flow of the ride to record or write something down, and I have been amazed by the connections my brain makes while “only” concentrating on the ride. Also, I do not know your route or traffic conditions, but if I was starting and stopping constantly to write things down or fiddling with a tape recorder, I would soon become an annoyance to fellow cyclists and drivers, and possibly a danger to them and myself. The semi-meditative state induced by my rides lead me to many great new ideas, and I do not believe I have missed any of them.