1. Make sure your release trigger was made by a reputable gunsmith with experience in release triggers.
2. If you are buying a used release trigger have the trigger examined by a reputable gunsmith with experience in release triggers.
3. Know your set weight and release weight set-up. My Precision Trigger on my Perrazi is set up with an 80 ounce set and a 20 ounce release. The smaller the spread between set and release, the "faster the trigger." Too fast of a release trigger could be difficult to manage.
4. I set the trigger with the required set weight and hold. I only set with more force if I do not take the shot and need to disengage the trigger. At that point, I am holding the trigger with significantly greater force.
5. I set the trigger after I mount the gun, I then pause to set the eyes and call for the target. I know a few shooters who set the trigger before the mount, but I am not comfortable with that.
6. I agree with the dry fire practice. Definitely be clear about your procedure for disengaging the trigger after you have set it in the instance of your not taking a shot. I agree with the non-trigger hand disengagement. Different guns will have different ways of deactivating a set trigger (basically opening the action).
7. When you first start, be aware. Set the trigger, release the trigger. I have seen people trying release triggers forget to set the trigger, so they get a delayed set and release, and I have seen people who have set the trigger pull the trigger instead of release and then get a delayed fire when they finally release the trigger.
8. Avoid shooting a release trigger or allowing others to shoot a release trigger without practicing. I have seen people with release triggers allow people to "try" their release triggers and that is when you get results like I mentioned above.