Best advice is write one paragraph or one page a day on one story~don't let yourself float from beginning to beginning. That's too easy, it's too light and fun. And when i do it, nothing is ever accomplished.

Have you ever read the Amber Chronicles? For me, writing is like walking the Pattern. It starts out easy and I feel powerful, but the farther in I get, the more committed, the slower and more excruciating it becomes to put one foot in front of the other. But it's just as rewarding for me to come out into the middle of that labyrinth as it is for Corwin. And fatal, at least for the story, if i stop for too long.

Ah, labored metaphors. Gotta love 'em.