If your calendar looks more like a game of Tetris and your inner monologue sounds like, “Why did I say yes to that?”, it might be time to embrace the two-letter word we love to hate: no.
Saying no isn’t selfish. It’s a wellbeing strategy backed by science. In positive psychology, setting boundaries is seen as a key component of self-regulation—that essential skill that helps you protect your time, energy, and values. And when we say yes to everything, we end up saying no to the things that matter most: rest, focus, family, and our own mental health.
Why We Struggle to Say No
Blame it on our wiring. As social creatures, we’re hardwired to want to belong. Psychologists call it affiliation motivation – that inner drive to connect and be accepted by others. So when someone asks for help, we say yes to avoid guilt, conflict, or the dreaded label of being ‘difficult’. But research by Dr. Vanessa Bohns at Cornell University shows people often overestimate how negatively others will react to being told no. In reality, people are usually far more understanding than we fear.
The Cost of Overcommitting
Chronic people-pleasing isn’t just exhausting – it can have real mental and physical consequences. A study in the Journal of Occupational Health Psychology found that employees who regularly took on too much were more likely to experience burnout, poor sleep, and even physical symptoms like headaches and muscle tension. In contrast, those who set boundaries and communicated assertively reported higher job satisfaction and lower stress levels.
What Positive Psychology Says
Saying no aligns with self-determination theory, a central framework in positive psychology that suggests we all need three basic things to thrive: autonomy, competence, and connection. Every time you say no with intention, you reinforce your autonomy—your ability to steer your own life. That’s not just empowering. It’s energising.

How to Say No (Without the Guilt Trip)
Here are five guilt-free ways to reclaim your time and energy:
- The polite no: “Thanks so much for thinking of me, but I’m not able to take that on right now.”
- The redirect: “That’s not something I can help with, but have you thought about asking [X]?”
- The buffer: “When do you need that by? Let me check my schedule and get back to you.” (Great for giving yourself space before replying.)
- The values-based no: “I’ve committed to protecting some downtime so I can show up fully for the rest of the week.”
- The assertive no: “That doesn’t work for me, but I hope it goes well.”
A Final Thought
Saying no isn’t about shutting people out. It’s about showing up as your best self when it really counts. If you want to be more creative, focused, and emotionally present—at work and at home—you need room to breathe.
So here’s your permission slip: say no when you mean no. Not with guilt, but with grace. Because taking care of your time is taking care of your mental health—and that’s always worth protecting.