After graduating cum laude with a BA in economics from Harvard, I worked in hedge funds and investment banking for ~6 years before leaving to manage my own money full time. I am a CFA charterholder and focus mostly on microcaps / event-oriented trades as that is where I think the market tends to be least efficient. I also started a website to track interesting arbitrage opportunities for individual investors (link below) - check it out!
I am a reformed MD, now with a finance MBA, and studying valuation independently by developing some conservative DCF models using FCF per share. You can make any investment work if you set a low enough discount rate.... that's one of the discouraging things about doing anything other than passive index investing. Forecasting isn't too accurate, those darn standard deviations are too wide. Margins of safety and alpha are rare and hard to separate from the noise.