Here's some good stuff for us writers, borrowed from Uncle Jim's thread at Absolute Write Water Cooler: 10 Rules for Writing Fiction. Of course, there is no better rule in my book than reading fiction, and practicing your craft. Don't take shortcuts, they get you lost. Write all the time. If you don't have your laptop or pen and paper handy, think of the lines, imgine the characters, visualize the setting. You may not remember it verbatim later, and you may improve the original idea. I do this at bedtime and in the shower a lot.
So, practice, and Happy Writing!