RE: when do you nock your arrow ?
m9a9g9i9c, your arrow nocks ARE too small. They should not be tight enough to make an audible click when you nock up. You want just enough snap to keep the nock on the string while you draw and shoot, but it should be loose enough to pull off the string without moving the string. You either need to carefully file those nocks with an emory board - equal amounts from both ears! - or re serve your string with a smaller diameter serving material.
I have never nocked an arrow until I was getting ready to draw. It's just too dangerous having exposed, razor sharp blades sitting around, just waiting for a chance to bite.
You guys who walk around with arrows loaded up and nocked, I hope you never slip and fall. That's an excellent way to bury a broadhead in a leg. If you've been doing it for years and don't intend to mend your ways, I wish you continued good luck.