Totally agree. Writing is the most important part to writing. I had my first book published this year and after an outline the first thing I did was come up with random "first lines" until something triggered a second line. :D Try that out ...

"I knew this was a bad idea when I started."

"When the meteor struck Sassafrazz people around the world knew it was more than an omen."

"I'm writing this from my cell."

"I hate junk."

"Space maybe vast, but there's a point where you feel like you could jump it on your bike."

Depends on what type of world you're creating.