I assume you mean in the context of software development? I use vim as my IDE which automatically highlights the word "TODO" in bright colours when it is in a

I assume you mean in the context of software development? I use vim as my IDE which automatically highlights the word "TODO" in bright colours when it is in a comment. So I leave // TODO comments in various parts of our codebase that need attention later down the line - and I also append one or more asterisk symbols depending on how urgent it is, like so: // TODO ** Refactor abc to do xyz. Then from the Linux CLI I can "grep -R TODO *" in the codebase's top level directory to get a full list of items on my TODO list, and depending on the number of asterisks before each comment description, I know which item I need to prioritise. Hope that helps!