If you have already decided upon another major, you still might want to consider a joint major with economics. A dual degree will further differentiate you from other graduates of your first major. The analytical skills that your will learn in economics will nicely complement what you are learning in other programs. Analytical skills are scarce and are valued by employers.
In many cases the extra course work associated with a joint major is not all that great. For example, if you major is Business Administration, you need to complete 30 hours in economics – Principles, Intermediate Microeconomics, and Macroeconomics and 18 futher credits – beyond the requirements for your business degree. You do not need to meet other Arts and Sciences requirements.