Comment by hiq

What do you mean by coming up? Like a deadline?

For event-based things I tend to have a reminder on my calendar. If things are relatively important, you'd assign them some kind of priority; in a simple .txt file, I'd expect them to be at the top for instance.

If the file has too many important tasks (such that I lose track of them), it means that at least some of them are not actually important and they should be revisited. IIRC that's the point of the weekly review mentioned in the GTD book: don't assume your workflow keeps working as you use it, there is some regular maintenance involving taking a step back and revisitings tasks, prioritizations etc.