The best way is always to stop when you are going good and when you know what will happen next. If you do that every day when you are writing a novel you will never be stuck. That is the most valuable thing I can tell you so try to remember it.
Struggling writers are often advised to pick a simple genre, but it doesn't work that way.
If you're just starting out as a writer, you could do worse than strip your television's electric plug-wire, wrap a spike around it, and then stick it back into the wall. See what blows, and how far. Just an idea.
My most important piece of advice to all you would-be writers: when you write, try to leave out all the parts readers skip.
Advice to young writers? Always the same advice: learn to trust our own judgment.
I always advise children who ask me for tips on being a writer to read as much as they possibly can. Jane Austen gave a young friend the same advice, so I'm in good company there.
The experienced writer says to the anguished novice: 'Just do it; get something, anything, on to the screen or page, just establish a flow of words, and criticise them later.' You give this advice but can't always take it.
Our writers are full of cliches just as old barns are full of bats. There is obviously no rule about this, except that anything that you suspect of being a cliche undoubtedly is one and had better be removed.