Surely you know the Slide Sorter exists in PowerPoint (View->Slide Sorter), but do you know you can press Alt-4 to get there quickly?
Also, inside the Slide Sorter, pressing Enter will bring you to the currently selected slide.
And while we are at this subject, try Alt-1, Alt-2 and Alt-3 as well.
P.S. In Windows, such keys are techically called “accelerators”.
