Something that you should take particular notice of is the fact that the best scripts have very few explanatory passages. Adding explanation to the descriptive passages of a screenplay is the most dangerous trap you can fall into. It's easy to explain the psychological state of a character at a particular moment, but it's very difficult to describe it through the delicate nuances of action and dialogue. Yet it is not impossible. A great deal about this can be learned from the study of the great plays, and I believe the 'hard-boiled' detective novels can also be very instructive.

Something that you should take particular notice of is the fact that the best scripts have very few explanatory passages. Adding explanation to the descriptive passages of a screenplay is the most dangerous trap you can fall into. It's easy to explain the psychological state of a character at a particular moment, but it's very difficult to describe it through the delicate nuances of action and dialogue. Yet it is not impossible. A great deal about this can be learned from the study of the great plays, and I believe the 'hard-boiled' detective novels can also be very instructive.