On September 5, we observe Labor Day, which is dedicated to the social and economic achievements of American workers. Of course, if you&rsquo;re like most people, work is essential to your life, both as a means of personal fulfillment and as a necessity for achieving your financial goals, such as a comfortable retirement. But if you&rsquo;re going to attain those goals, you&rsquo;ll want your investments to work as hard as you do. 