When you want to write about 'rain', stay in and under the rain - not sheltered under a roof or an umbrella. When you want to write about a sunset, go look at one and feel the joy of watching beauty and magnificence at its best.
That's so much about writing -- write what you know, feel, and understand and express it with truth honesty and simplicity. These things dwell in the heart. Write with your heart as your pen.