I've blogged before about the three stages of a career, here and again here.
Here's another jab at it - this time courtesy Microsoft Office.
Stage 1: You use Excel and Word to write long reports backed by hugely complicated Excel models.
Stage 2: You get someone else to do the Excel and Word part, and just use PowerPoint to make the presentation you will give to show the work to someone.
Stage 3: You get someone else to do the Powerpoints too. At this point you are almost exclusively using Outlook to shoot out orders willy nilly.
By now you are: (a) probably pretty big & (b) almost certainly a postoffice