Banking jobs like PO, Clarical, etc. very stable and well-balanced jobs, and IAS, IPS are the most difficult stuff.
Be a professor by giving a relevant entrance exam, and go for research.
Like MBA jobs, very effective, but you need to be a graduate and crack the CAT to get into a good college.
Make a start-up, do your own thing.
Prefer IT, followed by Instrumental, and Computer Science, and a huge scope in the IT sector.