Wade Patton...First rule of set triggers: don't set it until you're ready to make the shot.
Yup
I would go one further, guys - don't set the trigger until the hammer is at full cock & the frizzen is closed - then do not touch it until aimed and ready to fire.
I have seen guys set the trigger before bringing the cock to full bent position & closing the frizzen. If the sear slips while you are closing the frizzen, you WILL
receive a most frightful burn, straight from the vent.
Yes, there are triggers that must be "set" before the cock can be set to full bent position. I had one of those and replaced it with double set, double throw triggers.
Do as you need to.