Yesterday's blog -- First Draft Twitters -- was in response to a writer who has written one very successful book and is now slogging her way through draft one of book two.
I've found that for most writers Book Two is at least as difficult to get written, if not more, than Book One.
Doubts about ability, luck, the depth of the creative well crop up more in draft one of book two.
Same advice applies for draft one of any book -- just get it down. Can't finesse that which isn't written.