Relatedly, I schedule all my todos and my todo list contains only the ones scheduled to within the last week. If a todo is at risk of lapsing from the list, I will either have to actively reschedule it, in which case it is probably important to me, or it just drops into a list of stale todos. Occasionally I remember stale todos and can reschedule them or when I have enough time I browse the list of stale todos to see if there is anything still interesting.
Edit: This method helps because I get overwhelmed and anxious from overly long todo lists.
Relatedly, I schedule all my todos and my todo list contains only the ones scheduled to within the last week. If a todo is at risk of lapsing from the list, I will either have to actively reschedule it, in which case it is probably important to me, or it just drops into a list of stale todos. Occasionally I remember stale todos and can reschedule them or when I have enough time I browse the list of stale todos to see if there is anything still interesting.
Edit: This method helps because I get overwhelmed and anxious from overly long todo lists.