When programming, I will often have four or five general steps ahead jotted down. If a sub-problem comes up, I might literally push the first sheet down on the

When programming, I will often have four or five general steps ahead jotted down. If a sub-problem comes up, I might literally push the first sheet down on the stack, "open up" a new sheet, and then pop that off the stack when done, returning me to the previous sheet. This tends to merge smoothly with what the article describes as the Ivy-Lee method, so far as having a context to refer to capturing larger tasks for a [next] day.