Sleep is not only an integral part of everyone's life, but provides an incredibly accurate mirror on the quality of life. Disturbed sleep equates with disturbed daytime functioning. Such a correlation makes great sense, particularly with the realization that sleep and wake cycles are based in the same biological rhythms. While everyone has a few nights of suboptimal sleep from time to time, some people live their lives sleeping poorly, experiencing daytime sleepiness, and functioning marginally. The causes of these patterns of poor sleep are many, and this paper will focus on how to focus a lens on clinical assessment of sleep to make sense out of sleep-related complaints and related behaviors in persons receiving home care services.