Clarity and conciseness of expression are crucial elements to good writing, as Eryan pointed out with reference to Tolkien.
Many writers start out by putting in too much detail in their writing, becase they have not yet developed confidence in their own expression.
For example:
"John banged his forhead against the steering wheel in frustration."
Do we really need the last two words? Why do people usually deliberately head but their steering wheel? All we really need is:
"John banged his head against the steering wheel."
The reader is able to gather that John is frustrated, without being told by the narrator.
This kind of revising is what leads to tight, concise but clear prose. Tolkien was an expert writer, and his writing shows that he knew just how much detail to include so that the reader got a clear image, without overburdening them with explaining the obvious. As readers, we enjoy being able to "work out what is happening" on our own a little bit.
An example that I like:
Quote:
"Now the little plane drops and the fat woman sitting next to him yelps and spills her coffee; his tray of food goes flying. With eyes closed he begins to count, one...and two...and three: a religious man, he thinks, might now decide to pray. Then it is over, they survive, and as the eighteen-seater settles high above the rift of blue which separates the island from the mainland, the pilot quickly and calmly sends his apologies." - Julia Leigh, The Hunter
In less than a paragraph, we get a clear image that the airline flight is experiencing turbulence (yet the word 'turbulence' is never used), the type of man the protagonist is (intelligent but unkind) and even a hint about the destination (small aircraft, few passangers - somwhere remote?).
I will try to bring in another (better) quote tomorrow.