I think the advice described here is distinctly different from "just do it". What it's describing is an alternative prioritization scheme for tasks. Instead of

I think the advice described here is distinctly different from "just do it". What it's describing is an alternative prioritization scheme for tasks. Instead of ordinary ways to prioritize like "do what's urgent" or "do what's important", the advice is to forget all that and just do whatever is bothering you most subjectively, even if objectively there's seemingly no need to do whatever it is right now. As an example, suppose there's some email you need to reply to within the next 2 months. From an objective standpoint, there's no need to take care of it immediately, and there are plausibly more important & urgent things to do. But now suppose that even thinking about this email gives you anxiety--then the advice is that replying to this email should be the top priority among everything in your life, because the barrier to handling it will only get worse the longer it sits there.