I have quite a few ilogic rules that I use at work and most were created to reduce the time required to generate a model, drawing and print the drawing for production. All of the rules have reduced the workflow time from days / hours to sometimes minutes.
My top ones:
1. Passing parameters and iproperties from a model to a drawing to populate the titleblock and parts lists. A very simple rule that saves a ton of time.
2. "Save / Print / Close" - Saves the drawing, creates a PDF copy in different folder locations, picks the correct printer based on sheet size and prints the file, then closes the drawing file; all with one click of the mouse.
3. Drawing update rule / template - multiple rules inside the drawing templates to update the views, scales the views, positions the views and places (2) different parts list ... again with one click of the mouse.
Of course, I am not an ilogic expert so most of the rules were created by an outside Inventor consultant / expert that I have been working with over the last few years, who has accomplished everything that has been asked from me.
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It's not easy maintaining this level of insanity !!!!!