In this paper, the authors present a survey of residential load controlling techniques to implement demand side management in future smart grid. Power generation sector facing important challenges in both quality and quantity to meet the increasing requirements of consumers. Energy efficiency, reliability, economics and integration of new energy resources are important issues to enhance the stability of power system infrastructure. Optimal energy consumption scheduling minimizes the energy consumption cost and reduces the Peak-to-Average Ratio (PAR) as well as peak load demand in peak hours.