Great advice to those interested in writing:

http://www.salon.com/books/writing/index.html?story=/books/laura_miller/2010/02/23/readers_advice_to_writers

In particular I like #4.  For years I was struggling with the idea of what good "writing" is.  I always felt I could come up with an interesting plot and characters, but I wondered if my skills in actually describing the events were good.  Over time, I've refined what I've done, and the dreaded "re-write" is a chore that nonetheless cleans up and enhances what I do.

Clarity, at least to me, is the key.  (And, no, I haven't -not by a long shot- succeeded as much as I want to in this regard, as some might attest to with some of my posts!)