What is the client message you told yourself you would answer in five minutes, then did not?

Every one of my businesses has one of these somewhere right now, a message I read, decided was not urgent, and then lost inside everything else that felt more urgent in the moment. By the time I remember it, I cannot always tell if it still needs a fast reply or if the moment already passed. Curious how everyone else catches these before they turn into an apology text. Is it a system, a habit, or mostly luck.