Write the vision: your vision needs to go from your head to something tangible (paper; computer; device)
Make it plain: your vision needs to be large and easy to read
Upon tables (clay/stone tablets): your vision needs to be placed in a public spot where people gather
That he may run that readeth it: 1) when people read your vision, it should cause them to hasten to prepare 2) your vision should excite people to herald the cause (spread the news)