When someone starts getting serious about writing screenplays it's a sure bet they'll eventually move to L.A., and this oversaturation of screenwriters in Hollywood makes it hard for amateurs to get advice on how to improve their skills.
Budding screenwriters should start by reading scripts from their favorite movies, many of which can be legally downloaded for free online, and check out this video from the Academy Originals YouTube channel entitled "What Advice Do You Have For Screenwriters?"
It features advice from heavy hitters lke Steven Spielberg and Danny Boyle (just to name a few), and the advice won't cost you a dime!
-Via No Film School