About three years ago, Tim Grittani decided to begin trading stocks with his life savings of $1,500. Today, the 24-year-old's portfolio is worth more than $1 million. How did he do it? Not by buying and selling stocks of large and well-known companies like Apple (AAPL, Fortune 500) or Ford (F, Fortune 500). Instead, Grittani trades penny stocks -- very small companies that typically have a price below $1. He's the first to admit that it's a risky strategy. And it's not for everyone. "I've been trading every single day for almost three years, and it's been a slow, day-to-day process," Grittani said. He spends the ... (full story)