This document is a seminar paper for the Faculty of Economics at the University of Niš. It discusses general methodological principles and their application in economics. The paper was written by Vladan Manojlović, student number 38819, in May 2008 under the supervision of Dr. Dragan. It provides free seminar, graduate and matriculation papers and supplementary literature on all topics as well as PowerPoint presentations and other educational materials available on various websites to help students create unique works by using and modifying existing papers and materials.