Create a shared backlog for every feature request or product idea you come up with. Organise your ideas into themes. Validate them with user feedback.
Connect relevant insights to ideas in your backlog. Come to a shared understanding of the problem, align on how to address it.
Assign statuses, like "New", "Testing", and "Validated", depending on the state of an idea, or a feature. Keep track of each one's progress.
Connect highlights to ideas in your backlog to contextualise the customer need they address.
Get your customer directly involved by getting them to give opportunity scores. Measure the cumulative potential to add value for your customers.