Having a mind and heart for missionaries:
Having a mind and heart for missionaries means faithful, sustainable, disciplined care. A thriving relationship promotes prayer. Prayerfulness promotes communication and contact - that is, relationship. It's a cycle. So to get it going...
Put it on the calendar – Mark when you are going to write personally, as a group or as a church on the calendar . We don’t naturally write letters or correspond by email these days so we need to book it in. Plan to do it, plan to do it regularly and then act upon those plans.
Don’t spread yourself too thinly. Think about how many missionaries you can feasibly maintain. A church can cover more than an individual but in all situations keep it sustainable so that it keeps on happening and doesn’t become an overwhelming exercise.