When in a stand, nocked. When going to and from the stand, quiver. When I'm Elk hunting, 90% of the time my arrow is in the quiver. I nock an arrow when coming up on an area where elk bed frequently and it reaks of elk and when I'm set up working a bull. If I make a move, I quiver my arrow and nock it when I set back up, unless I'm moving just a little ways. Whenever an arrow is on the string, it's slow going (hunting) and careful.
As mentioned, COMMON SENSE applies.
Why do they call it common sense when it's so hard to find?