When selecting long-term stocks, consider the following key factors:

1. Company Fundamentals: Evaluate the company's financial health by analyzing its balance sheet, income statement, and cash flow. Look for consistent revenue growth, strong profit margins, and manageable debt levels.

2. Industry Position: Consider the company's market position and competitive advantages. A strong brand, proprietary technology, or a large market share can be significant advantages.

3. Growth Potential: Assess the company's growth prospects. This includes looking at its potential for expansion, innovation, and ability to capitalize on industry trends.

4. Management Team: A competent and experienced management team can greatly influence a company's success. Research their track record and strategic vision.

5. Valuation: Analyze the stock's valuation using metrics like the Price-to-Earnings (P/E) ratio, Price-to-Book (P/B) ratio, and others. Compare these with industry peers to determine if the stock is fairly valued.

6. Economic Moat: Consider whether the company has a sustainable competitive advantage that can protect it from competitors.

7. Dividend History: For income-focused investors, a strong and consistent dividend history can be a positive indicator.

8. Market Conditions: Understand the broader economic environment and how it might affect the industry or company.

9. Risk Factors: Identify any potential risks, such as regulatory changes, technological disruptions, or geopolitical issues, that could impact the company's performance.

10. ESG Factors: Environmental, Social, and Governance criteria are increasingly important. Companies with strong ESG practices may have better long-term prospects.

By carefully evaluating these factors, investors can make more informed decisions about which stocks to hold for the long term.