Spent $50 on a mock interview session and it got me my first offer
I dropped 50 bucks on a one hour mock interview with a career coach in Columbus after I kept freezing up in real ones. The guy drilled me on the classic "tell me about a time you failed" thing for 20 straight minutes and it felt awful, but by the real interview at a logistics company I had a story ready and got the offer a week later. Best money I've spent on my job search so far. What's the most useful thing you've paid for while job hunting?