Don't like seeing this in Task Manager when trying to multitask?
Before working on your first Autodesk Infrastructure Modeler (AIM) model, be sure to go into the options under 3d Generation and restrict the number of Generator threads that the software can run simultaneously. I find that 1 or 2 fewer than the total number of cores works will - it lets me work in Map 3D, run Outlook and a browser, etc, and AIM still processs pretty quickly.
On the plus side, AIM has true multithreading! The CPU time below reflects all the cores in use, so rather than waiting 4 actual hours to get this much processing done, it's only been about 23 minutes (x 12 cores).
And yes, I fogot to use my own tip. :)