I regularly add new stock images to the site, but hitherto it has been a rather haphazard affair, as I tended to do so in batches. In other words, I try to work with a number of images, over-thinking about the theme, worrying about chronological order, or assuming that uploading images in batches is more time-efficient. Unfortunately, the result has been rather unsatisfactory, because I edited images, only to abandon them in a to-be-uploaded folder. Sometimes I forget to check this folder, and end up working on the same set of images.
Instead of trying to edit a number of images before uploading them, I have decided to add them as soon as they are edited and cropped to the correct sizes. It may be less efficient, but it avoids the situation where I spend some time without actually achieving the goal of adding images to this site.