“Don’t make a to do” means to not make a scene that attracts attention and might cause embarrassment for a person, group, or company. Children sometimes say “don’t make a scene” when they see a parent about to launch into a “process improvement seminar” with an employee at a store, restaurant, or hotel. Maybe you’ve said it mentally, or even out loud, to a spouse, partner, or team member.
Another meaning for “to do” is in the arena of list-making. Most of us manage a project “to do” list at work and another one (or more) at home. Calendar-planner-system apps and companies exist because of people’s to do lists and a need to keep track of project timelines and meetings. Our to do lists drive our activities and goal accomplishments.