I don't have too many answers, except the Catechism tells me that parents should encourage the vocation that is proper to each of their children, "fostering with special care any religious vocations," but it also emphatically states that adult children have the right and duty to choose for themselves and it then becomes a parent's duty to give advice and then respect their choices (which is a polite way of saying something that could be summed up in two words - butt out).
I also found this recent post with lots of really sound advice about the process of discernment and reminders that God will let you know His plan in His own time, when He thinks you're ready to hear it. Until then, pay attention to what God is calling you to do today.
Anyway, if you have any other great links on the topic, be sure to share them with us.
Thanks for listening, and keep praying for an increase in vocations.