I've gotten in the habit of writing notes in the comment section of Records in my search results at Ancestry. The comments help me remember details about the image and to know that I have viewed the image. This is a great timesaver when the image is of an index. I leave notes on how to navigate to the page it references and sometimes details about the names listed in the records. This is particularly helpful with common surnames in my research such as King and Cook where there are MANY men with the given names, John, William, Thomas etc. An example of one of my typical notes is shown below. If my notes are helpful to others, that's even better.