If you have already read the "how-to" books from Syd Field, Linda Seger, and others, then you must know that the three most important things you should be doing to enhance your craft are: reading screenplays, watching movies, and writing screenplays. After that, if you still need some motivation to write, then reading an exceptional book such as "Alternative Screenwriting" might be just the kick in the pants you need to keep you going. It's presentation is clear and fresh. And it does not just emphasise "alternative" approaches, either. In fact, it presents some of the most useful and succinct summaries of "mainstream" dramatic screenplay structure I have ever seen. This is not just another "how-to" book.