sorry I'm not going to be much help either, but I'll try...I don't know if this is in print, but there's often encouragement to use the "when someone you love dies" brochure anytime we happen to run into someone who's experienced a recent loss.
Also, one of the reasons we're told to go back to houses where we know the people don't want us to call anymore is because their heart may have changed. The inevitably someone will cite an experience where someone was always rude at the door, then one day they called on them in d2d work and they were receptive after having lost a loved one.
Also, just a cursory examination of most of the WT/Awake magazines will make it obvious that they'll appeal more to people who are overly worried about the condition of the world, which would betray emotional turmoil. In addition, we're often told that we're looking for those who are sighing and groaning over the conditions in the world (I think they may cite Romans 8:22,23 when this is referenced, maybe that's something to search for?)