Recent technical advances have made it possible to develop such devices, which are small in size, cheap and capable of wireless communication using radio interfaces and provide pervasive services to the user. Sensor networks are the extreme examples of such ubiquous and pervasive computer paradigm. The constraints imposed on the wireless sensor networks make it more prone to cost of computation. So, the major issue is to reduce the computation cost by implementing some optimization technique, so that the overall efficiency of the system increases without any loss of information. In this paper, we list out few optimization techniques that can be used in Elliptic Curve Cryptography for wireless sensor networks.