If you're wanting a little career guidance or want to check you're doing what you should be doing regarding this ol' screenwriting lark, you could do a lot worse than read this article. It's long (22 pages, and a pdf) but very engaging and worth saving on your desktop to dip into in coffee breaks.
Remember, if you want your fave article or even one of your own on The Bang2write List of Wonder, then email me the link! We're particularly low on ones about effective dialogue. Equally, if you'd like to see ones on a particular topic that you feel I've missed, drop me a line.