To help you or your users to remember to enter time on a daily basis, daily reminders can be setup. Daily reminders will be emailed to your users based upon criteria the user or your administrator has setup. Criteria can be setup so it emails daily at a specified time, and optionally only if the current or previous day has a set amount of hours.
The screen below shows how to setup a daily email reminder. This screen is located in the user setup page or on each users own personal settings area. The users personal settings area is shown below.