You have your addition and you breath a sigh of relief. But not too fast! Now, the real work begins. From day one, you want to ensure that your new team member understands the mission, values, preferred future and all the things you told them on your 'what they need to know' list. They have heard it from you, now you need to make sure that they 'get it' in terms of how they work on your team.
The more personal time you can spend on the front end, the faster they will get up to speed and develop what you want them to develop rather than trying to figure out the 'rules' by watching others.
Set aside regular times to just sit with them over the first six months to ask them what they are observing, what they are surprised about, what information they need to do their job, and how you can remove barriers for them. Ask them how they read the culture of your team and ministry. They are new - you might be surprised by what they observe as a new set of eyes coming in. Probe with questions so that you both learn and can know how well they are assimilating into the organization. Make personal introductions to those they need to know in the organization.
For your own purposes and so you can do a better job with the next hire, after six months ask them to tell you what they wish they had been told on the front end, what the most difficult part of the transition was and what was most helpful in the entire process. Jot down their feedback and incorporate it into your next hiring process.
(Written from Berlin, Germany)