Enroll in a college economics course to learn the principles of macroeconomics. The course will include references to other economic disciplines that are necessary context for macro theories.
Buy a beginner's guide to economics to study the basics of macroeconomic ideas. For example, "A Bluffer's Guide to Economics," "Economics for Dummies" and "A Modern Guide to Macroeconomics" offere accessible explanations of the theories.
Visit a library to find macroeconomics textbooks or study guides, such as "Macroeconomics Study Guide and Workbook" by Roger Kaufman.
Focus on finding books about policy that was developed in the 1930s, after the Great Depression. Search for terms such as "fiscal policy" or "monetary policy," as these are guiding principles behind macroeconomics. When you find these books, look alongside them on the bookshelf for other sources with a similar theme.
Read about macroeconomics concepts described by Robert Barro and David Gordon (1983), Finn Kydland and Edward Prescott (1977) and Robert Lucas (1976). As the Federal Reserve Bank of Minneapolis explains, these theorists had an influence on government fiscal policy today. In addition, read Milton Friedman (1969) who was a significant thinker behind monetary policy.
Watch and read online tutorials from tutor2u.net, which provides educational articles relating to macroeconomics, and from freevideolectures.com where you'll find a video series called "Macroeconomics" presented by Professor Brue.
Write down key ideas, theorists, principles and examples as you learn about macroeconomics. Then, read articles in publications such as "The Economist" or the "Financial Times" relating to interest rates, inflation or changes in tax levels. Use your notes to explain the principles that affect these macroeconomic news items.