Try living your life without air. Like being held under water too long. It leads to panic. For me, not writing is like that.
And why exactly 100 words? Practice and discipline.
The practice part forces me to hone my writing craft. Thinking carefully about my words, ensuring I write the right words (see what I did there?).
The discipline part is even more important. To write better, you must write more. Want to write better songs? Write more songs. It’s that simple.
I. Must. Write.