You read what you have written and, as you always stop when you know what is going to happen next, you go on from there. You write until you come to a place where you still have your juice and know what will happen next and you stop and try to live through until the next day when you hit it again.
My own education has been entirely controversial: that is why I know what I am writing about; and appear eccentric to dogmatically educated Old School Ties whose heads are stuffed with obsolete shibboleths.
There's certainly more new SF available than when I started writing. That means there's also more bad SF available. Whether there is also more good is a matter for future historians of the field.
They tell me that So-and-So, who does not write prefaces, is no charlatan. Well, I am. I first caught the ear of the British public on a cart in Hyde Park, to the blaring of brass bands,and this . . . because . . . I am a natural-born mountebank.
God bless my soul, woman, the more personal you are the better! This is a story of human beings - not dummies! Be personal - be prejudiced - be catty - be anything you please! Write the thing your own way. We can always prune out the bits that are libellous afterwards!