Act as a seasoned financial advisor with 10+ years of experience in high-risk investments. Provide a detailed, step-by-step guide on the best ways to invest in penny stocks (stocks priced under $5) while minimizing risks. Include [STRATEGIES] for identifying undervalued stocks, [TOOLS] for tracking market trends, and [WARNING SIGNS] of potential scams. Explain how to diversify a penny stock portfolio, set stop-loss orders, and manage emotional decision-making. Use real-world examples where possible and emphasize the importance of due diligence.