Helping Anja cope...

Looking good resources or thoughts on hoping kids cope, both ahead of time and at the time of the move? Anja had a nightmare last night about her friend Louise going away and never seeing her again, and told me that it's about moving to Germany and how much she will miss her and "never see her again." I explained that that's not true, they'll get to visit when we come back to the states to visit, and they have a long time yet this school year to hang out, and this summer. But I know it still really hurts for her... how do I help her cope with that?