Buffett watchers prepare for weekend at Warren's, anticipating Berkshire annual report

For countless investors, Berkshire Hathaway's annual report represents a chance to spend some time seeing the business world through the eyes of Warren Buffett, its CEO and one of the richest men in the world. The report, and Buffett's letter to shareholders, is scheduled for release on the company's website at 8 a.m. tomorrow.

It's been a tumultuous year for Berkshire Hathaway, which owns scores of businesses, including several insurance companies, and controls billions of dollars in stock and bond investments in some of the best-known companies in the world. Look for Buffett to discuss some of his high-profile holdings and the performance of his portfolio companies.

Here are five things to watch for: