There isn't a roadmap for the for-profit startup. The first step is filing the legal paperwork for the business. The rest is up to you. (But let the rest of this wiki serve as a guide for steps that you can/should consider taking.)

There are many types of for-profit business entities in the U.S., including (but not limited to) LLCs, co-operatives, sole proprietorships and L3Cs.

You'll be registering your business with a state, so here is a guide to state-by-state corporation laws and regulations.

Recommended Readings

Notable For-Profit News Startups