About 64% of people in the general population have sleep problems at least a few nights a week, with 41% reporting problems every night or almost every night (National Sleep Foundation [ NSF ], 2009). These sleep problems can negatively affect daily activities. Work performance usually declines due to frequent absenteeism, lower job satisfaction, decreased motivation and concentration, and workplace injuries (Drake, Roehrs, & Roth, 2003; Leger, Guilleminault, Bader, Levy, & Paillard, 2002; Scott & Judge, 2006). Furthermore, sleep problems can lead to physical illnesses such as headaches and gastrointestinal disorders (Sateia & Nowell, 2004; Thase, 2005). You may also notice that when sleep problems occur, the quality of your sleep is negatively affected. Understanding and measuring sleep quality is important as poor sleep quality can have a huge impact on an individual's quality of life. Sleep quality is a complex and difficult to define phenomenon. However, most researchers agree that sleep quality includes quantitative aspects of sleep, such as sleep duration and latency, along with more subjective aspects, such as sleep depth (Buysse, 1989). Ultimately, compared to their better-sleeping counterparts, people with poor sleep quality are less likely to work well and efficiently, exercise, eat healthily, and engage in recreational activities (NSF, 2009). Additionally, while poor sleep quality impacts physical health, forgiveness has also been shown to correlate with physical health. In fact, research indicates a significant correlation between forgiveness and physical health. In a study conducted by Witviliet, Ludwig, and Vander Lann (2001), differences in the sympathetic nervous system were... half of the paper... MS, Pan, W., Kirschman, K.J.B., Lutz -Zois, C., & Lyon , A. M. (2008). Negative affectivity and anger rumination as mediators between forgiveness and sleep quality. Journal of Behavioral Medicine, 31, 478-488. doi: 10.1007/s10865-008-9172-5Thase, M. E. (2005). Correlates and consequences of insomnia. General Hospital Psychiatry, 27, 100-112. doi:10.1016/j.genhosppsych.2004.09.006Thompson, LY, Snyder, CR, Hoffman, L., Michael, S.T., Rasmussen, H.N., Billings, L.S., Heinze, L., Neufeld, J.E., Shorey, H.S., Roberts, J. C., & Roberts, D. E. (2005). Dispositional forgiveness of self, others and situations. Journal of Personality, 73(2), 313-359. doi: 10.0000/j.1467-6494.2005.00311.xWitvliet, C. V., Ludwig, T. E., & Vander Lann, K. L. (2001). Granting forgiveness or holding a grudge: Implications for emotions, physiology, and health. Science of psychology, 12, 117-123.