Uses ACT principles to turn reflection into values-based action. Shows prompts for defusion, values clarity, and small committed steps.
If you tend to overthink, you have probably tried getting rid of anxious thoughts. It often works for a moment, then the thoughts return stronger, and you end up stuck in the same loop.
Acceptance and Commitment Therapy (ACT) takes a different approach. Instead of trying to eliminate uncomfortable thoughts and feelings, ACT builds psychological flexibility: the ability to stay present, open up to internal experiences, and still take action guided by what matters to you.
In this article, you will learn how to use ACT-style reflection as a practical writing exercise. The goal is not to write a polished journal entry. The goal is to move from mental noise to values-based action.
This is educational content, not medical advice. If you are struggling with severe distress, consider professional support.
ACT is commonly summarised through six core processes that support psychological flexibility: acceptance, cognitive defusion, present-moment awareness, self-as-context, values, and committed action.
Overthinking often shows up as:
ACT does not treat thoughts as commands that must be obeyed. It treats thoughts as mental events that can be noticed and held lightly while you choose actions aligned with your values.
A useful way to think about ACT is: you do not need perfect mental calm before you act. You need a direction.
In ACT, values are not goals. Values are ongoing qualities of action. A goal is “run 5km.” A value might be “health” or “vitality.” You never finish a value, but you can live it today.
When you clarify values, you can often reduce overthinking because you stop treating your mind’s alarms as the only thing that matters. You give yourself a stable compass.
Think of this as a nightly reset. Short, structured, and repeatable.
The ACT Reflection Loop: Notice, Open, Choose
What is happening inside me right now? What thoughts are showing up? What feelings are here? What sensations are in my body?
Instead of wrestling, can I make a little room for this experience? If this feeling could stay for a while, could I still handle my evening?
What matters here? If I was living my values in this area of life, what would I do next? What kind of person do I want to be in this situation?
Choose one small action you can realistically do within 24 hours. Tiny is fine. Specific is better.
Overthinking is often a fusion problem. You are not “thinking too much” in the abstract. You are stuck treating thoughts as literal truths.
Defusion helps you create a small gap between you and the thought. Importantly, defusion is not about replacing a negative thought with a positive one. It is about changing your relationship with the thought.
Instead of: “I’m going to fail.”
Write: “I’m having the thought that I’m going to fail.”
This is a small linguistic shift, but it can reduce the thought’s grip.
Write: “My mind is telling me the ‘I’m not good enough’ story again.”
Naming patterns helps you recognise them as recurring mental habits rather than urgent truths.
Write: “Thanks, mind. I see you’re trying to protect me.”
This is not sarcasm. It is a way to acknowledge the protective intent of the mind without following it.
One classic defusion technique is rapidly repeating a single word from a negative self-thought until it starts to lose its literal meaning. In controlled studies, defusion techniques including word repetition have been shown to reduce the believability and discomfort of negative self-relevant thoughts. The main takeaway is that ACT defusion techniques aim to change the context of thoughts rather than fight their content.
Values work best when they are specific enough to guide behaviour.
Step 1: Pick one life area (do not do all at once)
Step 2: Choose 3 to 5 values that you want to stand for in that area
Use this prompt: “When I am at my best in this area, I want to be someone who is ___.”
Step 3: Turn one value into a “today behaviour”
Situation
You sent a draft. No reply yet. Your mind starts spinning.
Notice
Thoughts: “They hate it. I’m incompetent.”
Feelings: anxiety, tight chest
Defuse (write one line)
“I’m having the thought that I’m incompetent.”
Open
“This is anxiety. It can sit with me while I choose my next step.”
Values (choose one)
Competence and reliability
Committed action (tiny)
“Draft a 3-sentence follow-up: confirm timeline, offer one improvement, ask if anything is missing.”
You are not trying to make anxiety disappear. You are trying to act in a way you respect.
Situation
A friend replies late. You assume they are upset.
Notice
Thoughts: “They’re pulling away.”
Feelings: sadness, worry
Defuse (write one line)
“My mind is telling me the ‘rejection’ story.”
Values (choose one)
Connection and kindness
Committed action (tiny)
“Send one warm, non-needy message tomorrow: ‘Hope your day’s been okay. Want to catch up this week?’”
The goal is not certainty. The goal is values-based behaviour.
ACT emphasises changing patterns like cognitive fusion and avoidance, and building more flexible responding.
There is also research linking ACT-relevant processes like defusion and values-based living to improvements in distress and depression during treatment, suggesting these processes matter, not just the therapy label.
If your overthinking looks more like rumination, there is emerging evidence that ACT-based interventions can reduce rumination alongside improving psychological flexibility, though results can vary by study design and population. For a deeper look at the difference, see our guide on rumination vs reflection.
Values are chosen directions, not rules to punish yourself with.
Defusion is not avoidance. It is making room and acting anyway.
Start small. Acceptance is a practice, not a switch.
If the exercise turns into a long debate with yourself, you are back in the overthinking loop. Time-box it.
If you want the shortest version, use this. To make the committed action stick, you can turn it into an if-then plan. And if you want to make the action feel more personal, try framing it as a message to your future self.
If you want a calmer way to do nightly reflection with guided questions that help you stay specific and values-focused, try Ariveria.
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