Set up your Kanban board (To visualise your work, use sticky notes to record all your high priority tasks; you can use different coloured sticky notes to visually show different tasks)
This Personal Kanban Approach is The Simplest Way to Give Up Multitasking
Thomas Oppong

Highly recommend using Trello for this! It’s a productivity and management tool specifically built around a Kanban-style workflow. Great for personal use (FREE) and scales easily to business and team use. We use it daily for managing our project workflow.

Once you get used to a kanban style flow you won’t want to go back.