This also is entirely up to you. You might remove the images and replace them, reusing the same board for a different goal. Alternately, you might just keep a few of the images on the board to remind you that you achieved your goal, and open up the rest of the board for images for your next manifestation. You also could save each vision board you make if you have space. If there is room on your walls, you could keep them on display. If not, you could store them and pull them out now and again to look back on your successful journeys. You could then start a brand new vision board for each of your future manifestations.