This site, sponsored by the U.S. Department of Labor, has tons of useful tools and information for everyone in this sub.
You can look up job titles and get information on salary ranges for specific parts of the country, find job openings and lists of resume keywords, explore related occupations…
And that's just kind of the tip of the iceberg. I don't know why more people don't know about these tools, but they're there and free for the taking.
Don't forget: The more information you have, the stronger your position!