This past weekend I went to yet another NFP meeting. We heard one of the established teachers present her research on the topic. She presented on the process of discerning your family size and I thought it was great, especially since it was something I needed to hear.
She used a St. Ignatius exercise to discern whether or not to try to postpone or achieve pregnancy - ultimately it is out of our hands. She didn't give a handout yet (we will receive them soon), but this is what I remember.
Step one: Don't do this while ovulating - not that we girls would ever bring up a subject like babies unless we were 100% objective ;-)
Step two: sit down and think about it logically, weigh pros and cons
Step three: simplify question into something that can be answered by a strong yes or no
Step four: quiet yourself and listen (this could take days/weeks)
Step five: check to make sure the answer is in line with Church teaching because God wouldn't go against that
I bring this up because
a) I had done something similar to this exercise the night before at adoration and got a strong response to wait and without that I might turn into the nagging wife who "knows" when to have kids and just needs to prove that to her husband.
b) Wouldn't this be a nice piece of information that priests could hand out when the topic of NFP comes up? It goes a little further than just saying the couple needs to seek God's direction and go with that. This way we don't get the extreme responses on either end as well as some concrete steps a couple can take.