One of the things that I always wondered about Amazon Associates reports was that it the reports display what has been ordered but not the items that were clicked on but not ordered.

Recently I stumbled on that information by accident, so here it is:

Go to your Amazon Associates Orders Report.

Select a date range and scroll down to the report. Items with orders will be shown. But Items with no orders will be hidden, and if there were no orders during the period you select, there will be a very final-looking and misleading message "There was no activity in this period".