I tend to have files with names like foo, bar, or often just a single letter, but I rarely give my variables names like that. One thing you will find in my code a lot, however, is '# TAMARA' and '#NUKEME'. The second one is just for lines I want to remember to remove. The first is just a habit I picked up from a friend whose sole comments consisted of that. It's a good thing to grep for since it isn't likely to be in my file for any other reason. These are of course only 'work in progress' comments that are removed when I finish the program.