Just curious if anybody has a set routine or a go-to exercise to stay sailing fit. Or whether just general overall fit and healthy is enough.
I would think general fitness with maybe some bias towards chin-ups or pushups would be enough (not that this is what I do, but probably should 
)
Depends on what sort of sailing.
Back in my dinghy days I used to have a hiking machine I made out of some 2x4's and carpet for padding, hike while watching TV!!
Racing my Etchells now I find my forearms and fingers hurt most the next day if it's been blowing
I used to have a dummy side deck for hiking too. These days I just row about and ride a deadly treadly.
chopping firewood.
working in the garden.
digging holes,
sailing alot in wind tryna furl spinnakers that dont wanna be furled.
surfing.
Before I discovered beer during racing season I set my alarm to ring every hour during the day. Each time it rang I would stop what I was doing and do 10 super slow pushups. Squats then situps. 10 isn't hard to do but every hour that's 100 per day. It made winding winches and pulling sheets much easier. Accidental exercise too, like Mr miyagis idea. Row out to boat don't use outboard, lift anchor by hand, polish decks by hand not electric buffer (wax on wax off) , park at far end of car park not close end, carry stuff to boat don't use trolley... Etc
Giving up the outboard and chainsaw, and pick up the oars and the axe sounds like the general gist.
I like your method too Trek. I think life has become too convenient and lazy these days 
