I copy the dough to a text editor before I offer to take a handoff. It means that I have the dough ready to roll from the moment I accept, and lets me see if anyone else is offering to bake.
For me, the hardest part about timing is that I use TOR and sometimes I have to re-establish a new TOR connection several times before hitting an endpoint that isn't blocked. No problem for ordinary posts, but when baking it's a bit of an issue, and kind of serious for starting a new bread & getting the fresh bread posted before 751. I deal with that by doing the final notables a bit early, of course when depends on the speed of the bread.