The document outlines four major categories of works that can be undertaken in MGNREGS: 1) Public works relating to natural resource management like water conservation structures, watershed management, afforestation; 2) Individual assets for vulnerable sections like wells, ponds, land development; 3) Common infrastructure for self-help groups like storage facilities, work sheds; 4) Rural infrastructure like roads, drainage, sanitation, buildings. The document provides detailed lists of activities that fall under each of these four categories.