The Random Structural Diary plugin helps generate random questions from a predefined list to inspire new thoughts. It allows users to create and customize their own question sets, which can be structured into sections within a file. The plugin randomly selects questions based on user-defined settings, offering flexibility in how many questions are chosen from each section. Users can also opt to have the questions inserted directly at the cursor location. This plugin is particularly useful for those seeking a structured approach to journaling or creative thinking, offering a dynamic way to explore different perspectives with each session.