Watermarking your images in Photoshop can be important to keeping your work safe. Here is a very fast tutorial on how to create a watermark in a about 2 minutes.
Where are pictures number 042836 and 042868? Can I see those images? Every photographer who delivers digital files have been asked this question. How we avoid in 5 seconds by batch renaming!
Sometimes it is a cell phone picture or no picture. How can you polish those memories too? Getting your cell images into Lightroom and then printed or into albums.
The importance of backing up all of your digital data, especially your photography. If you don't back them up in at least two places, it does not exist.