An information system can be a valuable resource for a company. Everyday usage of the system realizes the benefits for the company. Recent research has focused on technology adoption and the concept of intention to use. In this study, employing psychological theories, we explain reasons affecting habitual usage behavior. A model for predicting habitual technology usage is developed and analyzed in detail. The results show that self-efficacy has a tight statistical and theoretical dependency with usage level, and a positive emotion seems to increase usage level as well.