@dpmcleod Hi there Dan!
Thanks for asking! I don't actually stretch my hands at all, but I do sometimes warm up playing a few exercises, or songs. Nowadays, having a family, two small kids, I sometimes don't find the time to pick up the guitar, so I take a day off from the guitar sometimes because of that. But I used to play at least 6 hours/day every day of the year Hope you have a great day Dan! Kind regards/E