Overthinking is the habit of replaying a conversation, rehearsing a worst case, or turning a decision over and over, making you doubt your choice. When your mind keeps returning to the same worries without finding a resolution, the repetition fuels anxiety and makes it harder to concentrate on what's in front of you.

When people hear the word mindfulness, they may picture someone sitting cross-legged with their eyes closed for 30 minutes. That image can make mindfulness seem unrealistic when your schedule is packed and your brain is thinking about six things at once.