Delete Things You’ll Never Do Keep Items You Aren’t Ready for Off the Product Backlog Periodically Review the Product Backlog Don’t Add Things Unless You Plan to Do Them Fairly Soon https://www.mountaingoatsoftware.com/blog/four-steps-to-keep-your-product-backlog-small-and-manageable

https://www.scrum.org/resources/blog/review-professional-scrum-product-owner-course-pspo

https://www.extremeuncertainty.com/misconceptions-product-backlog/ v/ @LeonTranterEU