where the writers are
Looking for some advise

Now I know, that to some people, writing just comes naturally. I often lay awake at night and come up what I think are wonderful ideas for a story, but I can't finish them. I wasn't sure if anyone had any advise for finishing the story, how to bring my characters to some kind of a conclusion (3-400 hundred pages in the ideas just stop coming), I hate to leave so many tales unfinished but it seems to the be the story of my life right now.

I welcome any and all suggestions.