(First post here, hi!)
I would also like to write a book. I used to do quite a bit of writing back in high school, but since discovering the internet in '93, I haven't really done a lot of long, continuous prose work. Sure, text-based roleplay and whatnot, but that isn't Writing, at least to me. So I sit here with at least two, maybe three, good ideas for long works, and am still ramping up the mindset I used to have that let me do writing.
And for the record, having portable writing options doesn't help. Three portables later, and still no book, no matter my visions of sitting in a cafe somewhere banging out the novel.
Thanks also to Steve for his listing of how he gets to actually writing, which I've written down. It's hard to tell what will work, for me: being very systematic or the Nano way of just
writing.