First don't get a liberal arts degree like sociology, english, psychology, philosophy, etc. Liberal arts degrees are very iffy and it can be hard landing a job within your field with just a bachelor's degree. If you want to go outside of the field then its harder for others to respect your degree.

These days specialized jobs and degrees are the best. Actually accountants make really good money. Anywhere from 40-200k. When you get older you wouldn't want to kill yourself. Its not just about money but quality of life too. Also only go to graduate school if you think the degree will make you more money within 3-5 years time, if it doesn't then just stick to the bachelor's.

The way to make money is to start your own business. If you really want to make more, then that is the way to do it. Speaking for myself, I am getting a four year degree in graphic design and I want to own my own design firm. They make good money 100K or more depending on how good you are.

You shouldn't have to go to professional school to make six figures. Think about what you like and look through the occupational outlook handbook link. It has various professions, their earnings, and what degrees and training you need to get there.