For example, I have a set of things I want to remember to do about every month (e.g. clean up my notes backlog, check in with my end of year goals, that sort of thing). It doesn’t have to be exactly every month, and they are of equal importance so if I delay doing one, I’m fine with it delaying the others. So I only allow one of those cards to be shown to me on a given day, and when I acknowledge that I’ve acted upon it (by “reviewing” the card), that card won’t be shown to me again for 30 days.