You can set up reminders for your tasks to receive a notification when your tasks are almost due.
You'll find the option to set up a reminder when you create a new task or edit an existing one (see the screenshot for where to set this). Reminders are personal, so only you will get the reminder that you set up.
Use the dropdown menu to select when you'd like to be reminded.
You can also go to your email notification settings to decide if you'd like to get an email when you're being reminded about a task or an upcoming meeting.