Returning to the original tempo after a change in the music is best indicated by what marking in the score?
Some authors on the Yahoo Contributor Network are able to make $50K+ per year. Payment is in two parts: Upfront and Performance. Upfront payments are in the range of $0-15 and do not preclude the contributor from receiving performance payments. Performance payments are $1-2 CPM for a given article.
Writers can make a decent living once they're work-for-hire. They generally can make 100k a year, best case for good startup writers. But keep in mind that most good scripts don't get made into films. There's only 100 ideas, but 100,000,000 writers. Good luck.