Choose anchors, not a checklist
Start with Hoan Kiem Lake and build outward only if the day still has room.
- Anchor the day around Hoan Kiem Lake or Old Quarter.
- Keep Dong Xuan Market for the right weather and timing.
The strongest attractions plan in Hanoi is selective. I would make Hoan Kiem Lake the first anchor, add Old Quarter or Temple of Literature if they sit naturally nearby, and save Dong Xuan Market for the right timing instead of forcing it.
The practical rule is simple: Hoan Kiem Lake and Old Quarter first, Temple of Literature or mausoleum area separately. That keeps the day grounded instead of making it feel like a loose checklist.