Here is a small idea that quietly changes how you handle worry: there are two completely different kinds, and they need opposite responses. Treat them the same and you will either neglect real problems or torture yourself over things you cannot touch. Sort them first, and most of the work is done.
The one question that sorts them
Take the worry and ask: is there an action I could take about this right now? Be concrete. Not could I theoretically do something someday, but a real, near-term step. If yes, it is a solvable problem. If the honest answer is no, there is nothing I can do right now, it is an unsolvable worry, at least for the moment. That single question routes every worry to its correct response.
Solvable worry: make a plan, then stop
A solvable worry is not really a worry. It is a problem wearing a worry's clothes, and the cure is a plan. The productive sequence is short: name the specific problem in a sentence, list your options without judging them, pick a good-enough next step, decide exactly when you will take it, and then, crucially, give yourself permission to stop thinking about it until then. This is the difference between worrying about a problem and actually addressing it. The mind worries partly to flag that something needs attention, and once it can see the something is captured in a concrete plan with a time attached, it is willing to let go. This structured approach is the practical heart of cognitive behavioral therapy (CBT), whose basic model, described on the NCBI Bookshelf, is that changing what you do with a thought changes how it affects you.
Unsolvable worry: practice letting go
An unsolvable worry is a hypothetical, a maybe, a what-if about something outside your control or not yet real. No plan is possible, because there is nothing to do. Here, thinking cannot help, and the only useful response is the practice of letting the question stay open. That means noticing the worry, acknowledging that you cannot resolve it, and turning your attention back to the present, again and again. It feels wrong at first, but chronic worry is driven by an intolerance of not knowing, which the NHS notes is central to generalised anxiety, and the way through is building tolerance for the open question rather than trying to close it.
Many worries split across both piles
A single worry often has a solvable part and an unsolvable part, and splitting it cleanly is often the whole solution. Take a health worry after a new symptom. The solvable part: book a doctor's appointment and get it checked. Once that is scheduled, that piece is handled. The unsolvable part: whether it turns out to be serious is not knowable right now, so that goes in the letting-go pile. Notice how the split converts a formless dread into one concrete action plus one piece of practiced acceptance, which is the whole of what can usefully be done.
When you cannot tell which pile it is
Sometimes you genuinely cannot tell, and the not-knowing becomes its own little spiral. Use a concrete-action test to break the tie: can I name one specific thing I could do today or tomorrow that would move this forward? Not a vague someday, a real near-term step. If you can name it, it is solvable, so schedule the step. If the only honest answer is no, treat it as unsolvable for now and practice release, revisiting later if the situation changes. The goal is not to sort perfectly for all time, just to know your next move right now. This do-something-with-the-thought approach is exactly what structured self-help for worry tends to encourage over endless rumination.
Why this matters so much for overthinkers
Overthinkers tend to make two mirror-image mistakes: they worry about unsolvable things as though worry were preparation, and they neglect to plan solvable things because worrying feels like doing something. The sorting test fixes both. It sends real problems toward action, which settles them, and sends hypotheticals toward acceptance, which is the only thing that helps them. We go deeper into the letting-go half in how to stop worrying about things you cannot control, and the balance of caring without spinning in how to worry less without becoming careless. For the full toolkit, including worksheets for both kinds, we walk through it in The Overthinker's Manual.