How about just simply adding a yes/no checkbox field to the record? You can just check off the ones that are done, or at least where you left off.

What I have done in the past is use the SettingT table. You could make a button and when you are done for the day, click the button, it will save the ID to the SettingT table using PutSetting , and then you could load it when you are ready to work on it again with GetSetting. App Settings

Almost every one of my tables that I create has a field, like Richard suggested, for a Yes/No check box called Tsel and that stands for Client Selection (T = client). Every form touches that field with a check box in the top right corner so people that can only work in a form can flag a record that needs attention. Somebody working in the table could use the same field as a Yes/No for needs attention. I use it all the time in development for testing fixes or as a reminder.