Well if all you care about is the salary, and don't mind programming, learn COBOL and JCL. You will be pretty much guaranteed a 75,000+ salary right out. Unfortunately, two or three universities in the entire United States teach these languages (I happen to go to one, so I learned them both). The languages really are dead beyond fortune 500 companies, so I hope you don't mind cubicles and working for gigantic IT shops.
As far as more realistic careers go, server maintenance is a great choice. Another good one hardware side would be network admins. Both of these pay very well and are always high in demand.