I use Getting Things Done with our own Tool Zenkit. The most time I work with Kanban Boards and organize everything in several columns (e.g. Inbox, To do today, next actions, calendar). I work with it every day and are happy when I can tick off the tasks I already did. For appointments and due dates, I switch to the calendar view to have a good overview. In Kanban, you can see your progress by having a look at the "Done" column.

At first, I organized everything with pen & paper but I always forgot to take my planner with me, so I switched to our online tool.