As part of a typical CBTi program, each morning you will record information about your sleep in a sleep diary or a sleep tracker. At the end of each week, you will estimate your sleep numbers for your typical night’s sleep of the previous week. You can do this yourself if using a CBTi workbook or other pen and paper method, or the numbers will be calculated for you if you are using a digital program such as an online CBTi program or app. Use these numbers to track changes in your sleep as you progress through the CBTi program.