[robinh]

RWH is a good recommendation, although it contains a rather large number of errors. LYAH is very good for learning the basics, too.

But, if you're already a very experienced programmer, you can probably learn how to write practical programs in Haskell by just reading the IO chapter (http://book.realworldhaskell.org/read/io.html) and the Systems Programming chapter (http://book.realworldhaskell.org/read/systems-programming-in...) from RWH. These will help you understand how IO actually works in Haskell. The rest is just libraries and learning the language itself.

On a related note: I've found that starting with the main IO function is a good way to start writing any large program in Haskell. Most people I know who complain about Haskell being a mess in impure environments tend to write pure functions first, then build their IO functions on top of that, instead of the other way around. I'm not sure whether this applies for everyone, and of course this approach works well in domains that have little to do with IO (e.g. mathematical programming), but it's something to keep in mind.