Hi Christopher,
The approach I take is as follows:
1) Pull up list of Next Actions (everything I could do today)
2) Star everything I want to do today
3) Access my view which only shows Starred tasks
4) This Starred view is grouped by Flag. I have three flags; To Do, Ongoing and Complete (a basic Kanban).
5) I change the flag of the task I want to work on to Ongoing. This highlights the task in Orange.
6) I collapse all the Flag groups apart from Ongoing and then F3 - this creates a new instance of MLO which I drag to my second monitor screen
7) All I can see on my second screen is the highlighted task I'm currrently working on. When that task is complete, I change the flag to Complete which removes the highlight and greys out the task
8) At the end of the day I tick off all the completed tasks (gives me an overview of everything I've achieved that day before I mark them actually complete.)
Hope that helps, sounds a bit complicated but it's quick when you get used to it. Let me know if you have any questions.
All the best
Richard