Stress Relief: This is the most common usage. After a stressful meeting or a long day of work, a person might say, “我需要静心一下” (Wǒ xūyào jìng xīn yīxià) - “I need to calm my mind for a bit.”
Improving Focus: Before a major task like an exam, a presentation, or creative work, people engage in activities to help them 静心. This could be listening to quiet music, deep breathing, or even practicing calligraphy (书法), which is considered a form of moving meditation.
Health and Wellness: The term is central to traditional wellness practices like Tai Chi (太极拳), Qigong (气功), and meditation. These activities are not just for physical health but are explicitly designed to help one 静心 and cultivate inner balance.
As an Adjective: It can be used to describe an environment or activity that helps one achieve this state. For example, “这个音乐很静心” (Zhège yīnyuè hěn jìng xīn) - “This music is very calming/soothing.”