The Tasks/To Do function in your email program, or Smartphone is often totally ignored.
This is a shame because with a bit of clever thinking this function can take you from being good at sales; good at customer service; good at business development / relationship management to being utterly spectacular.
Surely you have a 'To Do' list. You might maintain it mentally, or have 17 half crossed out lists scattered. You might use your calendar to prompt you. Wrong place. The calendar is built for appointments and meetings only. Reminders make you look unnaturally busy.
Using your memory or a written list is marvellous for short term to-do's. there is nothing like the satisfaction of physically crossing out something you've done. You wouldn't want to task everything on your computer - who wants to come in in the morning with 50 emails and 35 undone tasks? They'll never get done.
Let's look at the Task function another way. For long term persistency. Tenacity.