1. A method comprising the following computer-executable acts: identifying relationships between digital items retained on a first computing device in real-time based at least in part upon user action pertaining to the digital items; generating a first computer-implemented relationship table that relates different digital items by the relationships that have been identified; determining that the user is focusing on at least one digital item that is included in the relationship table; executing a machine learning algorithm over the relationship table with respect to the at least one digital item to generate an inference pertaining to the at least one digital item; and outputting a notification to the user pertaining to the at least one digital item based at least in part upon the generated inference.