Thinking clearly is an art. It’s also a skill. To stay on the right side of thought, I need to recognise the dangerous habits that can undermine or destroy my cognitive clarity. You can have a brilliant mind and still think badly. You can read hundreds of books and still interpret them poorly. Thinking is affected by habits. Most people unconsciously do them and actively degrade their cognitive functioning process. The habits may feel necessary. Even productive sometimes. But they are getting in the way of reasoning and your ability to solve difficult problems. The habits that destroy thinking are everywhere. They’re in your pocket. Your schedule. And way of life. But they don’t have to be your life. Watch out for these.

#Cognitive

heuristics. Thinking is work. Hard work. Your brain consumes about 20% of your body’s energy. For an organ that’s only just 2% of your weight, that’s a lot of work. Evolution designed your mind to conserve energy whenever possible. This means your brain takes shortcuts, also known as cognitive biases. The most destructive shortcut is confirmation bias.

Your brain naturally looks for knowledge, beliefs and everything that confirms what you already think is true. And dismisses all knowledge that makes you think. The very new wisdom that challenges your worldview. It feels right for your brain, but it’s intellectual suicide. If you’re always looking for information that matches what you already know, be aware. “Staying informed” doesn’t have to mean you curate sources that feel comfortable.

Psychologist and author of Thinking Fast and Slow Daniel Kahneman wrote, “We can be blind to the obvious, and we are also blind to our blindness.” You don’t know what you’re missing because you’ve trained yourself not to see it. The antidote is active discomfort. Seek out perspectives that challenge you. Read writers you disagree with. Force yourself to argue both sides of a problem. Exercise your cognitive muscles on purpose.

#Emotional

Reactivity and outrage loops. Strong negative emotions like anger, envy, and fear hijack your prefrontal cortex. The area responsible for logic, self-control, and long-term thinking. If you get drawn into too many arguments or obsess over workplace politics, your brain floods with cortisol and adrenaline. You switch into a threat-response mental state. In that mode, your mind wants victory and defense. You won’t be able to think clearly.

“Between stimulus and response there is a space. In that space is our power to choose our response,” says psychologist Viktor Frankl. Try a delay rule to never respond to an upsetting message immediately. Give it a minute or two. You will respond a lot better with mental clarity. Clear thinking is the refusal to let an unexamined feeling take over your head.

#Beware

of information gluttony. The average person takes in 100,000 words every day through all sorts of sources. Many of them don’t add value to our cognitive functioning. In fact, they make it worse. If we are informed so much, why are more people not smarter? Your working memory has limited capacity. It can hold a few things at once. When you flood it with always-on input, nothing sticks. You become a vessel for non-essentials. You know a little about everything and nothing specific. This is the paradox of our time. More information doesn’t mean more wisdom.

By all deliberate means, stay informed. But create a filter to improve the quality of content competing for your attention. Don’t fall for news psychology traps. Every source wants you to engage. Spend your brain energy wisely. Schopenhauer warned us when he said, “When we read, another person thinks for us: we merely repeat his mental process.” Don’t lose your capacity for thinking. A mind fed almost always without digestion becomes bloated. Thinking clearly requires unfilled time where nothing is coming and something has to come out.

#Physical

neglect. People treat their brains with little kindness. But expect it to perform at peak capacity. Stop feeding it with everything that makes it worse. All the ultra-processed options are doing more harm than good. Poor sleep. Sitting all day. Your brain requires proper fuel. It needs omega-3 fatty acids. It needs hydration. And glucose delivered steadily. The spike from all the sugar is a cognitive disaster. Sugary breakfasts followed by coffee and processed lunches and dinners are a disaster for your brain.

Sleep is even more critical for brain health. During sleep, your brain clears out metabolic waste. And consolidates memories. It makes connections between unrelated ideas. Every day you sleep poorly, you’re literally allowing toxins to accumulate in your brain. Also, exercise increases blood flow to the brain. It stimulates the release of BDNF, a protein that promotes neural growth. “All truly great thoughts are conceived while walking, Nietzsche said. Sitting for eight hours a day is as bad for your brain as it is for your heart. Seneca, the Roman philosopher, understood this when he wrote, “We should not be surprised at our loss of clarity, given the filth and congestion of our minds.”

#Over

-deciding small things. Your brain treats every choice with a similar cost. Picking an outfit, deciding on lunch, or choosing the best way to solve that problem at work drains the same finite reserve of mental energy as deciding a life-changing way forward in life. By mid-afternoon, your willpower reserves hit zero. You begin taking mental shortcuts. You defer hard choices, make impulsive decisions, or default to the path of least resistance.

Eliminating trivial decisions early in the day or routinising them preserves your mental energy for your most important thinking tasks. You can also front-load critical choices. Make your toughest, most important decisions within the first two hours of your workday.

#Avoidance

of solitude. You cannot think clearly if you cannot hear yourself think. As obvious as that reads, people can’t help but avoid time alone with their thoughts. Even when we are walking, we have podcasts or music. Silence makes you reach for a device. Solitude feels like a problem to solve. You haven’t been alone with your own thoughts in years. Some people are terrified of that experience. But solitude is how we find clarity. It’s where you process and connect disparate ideas. You can use it to ponder what matters to you. Or what you’re avoiding.

In just fifteen minutes a day, without screens, music, or reading, you can reconnect with yourself. Just you and your mind. Let yourself wander. As uncomfortable as that may be, it’s key to find clarity. If you can’t tolerate your own company, you’ll never hear what your own mind has to say.