To manage your activities you can create tasks, and these tasks can be assigned to a project, and projects can be assigned to customers.
This structure will help you to organize and categorize your activities.
The color labels identify to which project and customer a task belongs.
Projects are shown in blue and customers in green.
External projects you are invited to work in are shown in Orange
Don't worry if you forgot to start or stop the timer, you can always edit the activity and set the duration manually.