Feedback

 Interestingly, Cleese suggests getting feedback on four things about your writing:

(1) Were you bored?

(2) Where could you not understand what was going on?

(3) Where did you not find things credible?

(4) Was there anything you found emotionally confusing?

Cleese says that readers will probably suggest fixes and he suggests that unless the reader is also a writer you should smile and nod politely and completely ignore the advice. The object of the exercise is to identify the problems you have to work on, not to get solutions. 

When assessing suggestions, you need to avoid ego. Don't ask who is right. Ask which idea is better. 

The best time to get feedback is when your idea is sufficiently clear to benefit from someone else's judgement. If you wait until the project is "finished" you may waste a lot of time.