gistfile1.txt

Control.Arrow
Control.Applicative
Control.Foldl
Control.Monad
Control.DeepSeq
Control.Exception
Control.Concurrent{,.Async,.MVar,.STM}
Control.Monad.Catch
Control.Monad.Identity
Control.Monad.ST
Control.Monad.State.Class (use these methods)
Control.Monad.IO.Class
Control.Monad.Trans.Class
Control.Monad.Trans.Except
Control.Monad.Trans.State.Strict (I almost always jump to StateT rather than ReaderT or WriterT)
Data.Aeson
Data.List
Data.HashMap.Strict (or Data.Map.Strict)
Data.HashSet (or Data.Set)
Data.Graph
Data.Char
Data.Maybe
Data.Either
Data.Monoid (once Semigroup is a superclass of Monoid, use Data.Semigroup too)
Data.Foldable
Data.Vector
Data.ByteString
Data.Text
Foreign.C{,.Error,.String}
Foreign.{ForeignPtr,Ptr,StablePtr}
Foreign.Marshal.{Alloc,Array}
Foreign.Storable
Pipes (or Streaming or Data.Conduit)
Turtle
Store (or Data.Serialize or Data.Binary)