I recently went to London to make a podcast with two other tutors on E304. The aim was to give advice for students on doing their EMA. The edited version of the first part of the discussion can be found at https://www.youtube.com/watch?v=OrD9XnZGDVw&feature=youtu.be - I think the second part will be available soon.
I think/hope that hearing tutors discuss what they are hoping for in an EMA can be useful for students when they are writing their own work. I think it might help to demystify the project and make it seem manageable. It might also help the students that tutors are consistent and clear about what kinds of aspects they are looking for.