Freelance software developer. Haskelling at night. Hopefully unconventional. Fan of Dvorak
http://haskellbook.com/ - highly recommended book in the Haskell circles.
https://en.wikibooks.org/wiki/Haskell - I really liked the wikibook when I was learning Haskell. It's not as in depth, and does not cover all of the topics - but it's a great starting point.
What I wish I knew when learning Haskell - INCREDIBLY resourceful community edited document into a whole range of Haskell related topics. debugging, editors, frameworks etc. This thing is huge!
http://fpchat.com/ - a slack community. There is a dedicated #haskell-beginners channel. A great community - which was a HUGE help to me when I first started learning.
I see a lot of Haskell newcomers who are not aware of ghcid, which automatically reloads (compiles) your code within GHCI (the Haskell interpreter implementation) and shows relevant errors. Did I also mention it's incredibly fast, perhaps even instantaneous?