The correct approach is to refresh the entire dashboard with all 10 queries at once by setting up a single schedule for 8 AM. This method is efficient and leverages the dashboard's capability to automatically refresh all its queries on a schedule. To configure this, the dashboard owner or users with 'Can Edit' permission can:

1. Click the 'Schedule' button at the top right of the dashboard.
2. Select a period in the 'Refresh every' drop-down.
3. Optionally select a SQL warehouse for the queries in the 'SQL Warehouse' drop-down.
4. Optionally enter email addresses to notify when the dashboard is updated.
5. Click 'Save' to activate the schedule.