Sorry to come to this late, but I am a published writer too - as some people on here already know. I can give advice where needed, but need the encouragement and support and general arse-kicking too!!
I've done literary fiction, non-fiction, TV tie-ins and children's fiction - 10 books published, with 3 more contracted and coming out over the next 15 months.
As others have said, it doesn't get easier. Unpublished writers may gaze at us in awe and envy, but really it's no picnic!
The money is awful. Really bloody awful. I found a Facebook group recently, populated by twentysomethings who work in editorial/publicity jobs in publishing - all moaning their arses off about their poor pay (£12-20k in most cases). Most writers would kill for such an annual income! And it's exacerbated by the fact that people (and some of these publishing staff too) think that we have an easy life and a wealthy lifestyle.
I supplement mine with Creative Writing teaching (I'm joining the staff of a renowned MA course in 2011), and a good few school visits (which do pay well, as the Society of Authors has fixed a recommended price - doesn't stop some schools thinking it's too much though!)...
My last book was horrendously late - I mean many, many weeks late. And my editor is making her presence known with the new one, wanting to interfere a lot... And there is always that feeling that Terry Pratchett describes, that someone is going to tap you on the shoulder and tell you that you've been found out.