My approach would be to create one task “Setup DMARC record for my domain” in your Business project and make all its component actions as subtasks within. Don’t assign the parent task to yourself (or do so for a date when you expect all work to be completed) but instead assign each subtask to yourself, optionally with a due date.
Your mini-project is too small for an Asana project to group them together, so that’s the value of the parent task here: grouping.
You can add dependencies between these tasks but for me that’s usually overkill for my own work, though could be helpful for collaborative work to add clarity.
I don’t see any immediate value for sections like “Single Business Action Items” or “Quick Business Projects;” I think I answered in another thread that general actionable tasks are fine to go at the top of your project not in any section and just use sections for meaningful groupings. (I will often have a “Reference” section in a project, for example.)
For Waiting actions, see my suggestion for a My Tasks > Pending section in:
and remember to check it every few days.
Thanks,
Larry