Some people waywardly float through their professional lives, while others have known since birth that they're destined to be Urine Specimen Collectors. If you're unfortunate enough to lack that certainty, you need JobTitled.
Conceived by a GA Tech & GSU-schooled computer science grad, JT gives a free overview of the directions a slew of careers tend to go, as determined by leveraging job boards, blogs, forums, and public databases for resumes, work histories, and other "historical data", still images of which will be slowly zoomed in on by Ken Burns. Just fill out a resume-like profile, and the site will display your "Career Trajectory", or what your education and professional accomplishments should get you -- so depending on his specs, an Account Exec can expect to hold that job for X amount of time, before spending X time as a Sales Manager, followed by X time as a Partner and, once he determines that despite the aforementioned ascent he's still miserable, X time as an independent biz Owner. If you're pondering a change, search out other jobs by title or degree likely to lead to them, and get a summary of the position, additional qualifications you'll need to advance (34.2% of CFOs have a Master's, 12% of those in finance), and a projected rate of betterment based on "a complex algorithm" -- though unless you're climbing the ranks as a Mathematical Statistician, that pretty much covers all algorithms.
JT's securing partnerships with universities and job boards to further build their database of career trend statistics, and also maintains a blog on getting the most out of the site -- such enthralling stuff, you'll end up collecting a specimen in your pants.