Find the exchange-traded funds (ETFs) which track the performance of the industry that interests you and check out the stocks they're investing in. This is as easy as searching for "Industry X ETF." The official ETF page will disclose the fund's top holdings. Use a screener to filter stocks based on specific criteria, such as sector and industry. Screeners offer users additional features such as the ability to sort companies based on market cap, dividend yield, and other useful investment metrics. Search the blogosphere, stock analysis articles, and financial news releases for news and commentary on companies in the investment space you've targeted.