I don't have a set schedule for doing anything anymore.
Every time that I ride I make a mental list of maintenance or adjustments that I want to do before my next ride. I'm pretty in tune to chain and derailleur noises and things like that. That's pretty much all I do. I don't even top up my tires before every ride anymore.
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My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.