Have you ever considered using a map or globe as a prayer aid? The idea reminds me of the old song "He's Got the Whole World in His Hands." This is especially good for groups. You will need a map or a globe in the center of the meeting area.
Each member of the group names a situation in countries, esp. those countries where they have a contact or interest. Make a note of the prayer on a sticky note and put it on the map in the proper place. You may be surprised at how many people in your group have contacts around the world.
Pray for the concerns before the meeting closes and then keep the map or globe for the next meeting to see how things are changing.
This type of prayer can be expanded to include an entire congregation. One ministry group should be responsible for the map and for starting the prayer notes. Then announce to the membership that they should pick a location that needs prayer and place a sticky note on it. Keep this going for a few weeks and see how much of the world can be covered in prayer.