The best writing advice is very simple. It’s also the one many young writers like the least and find the hardest to apply.
That advice is: write.
Of course it comes with variations of substeps like Write some more. Keep writing. Write again.
Often, young writers search relentlessly for the best writing tips and rules and advice believing once they know all that their stories will magically be fantastic. But that’s not how good writing works. Good writing requires lots of practice. You can’t skip the steps. Through practice we develop understanding of the story, of the way words and phrases work, of how we work.
Here’s Ursula L Guin’s answer for the question How do you make something good?
“Inexperienced writers tend to seek the recipes for writing well. You buy the cookbook, you take the list of ingredients, you follow the directions, and behold! A masterpiece! The Never-Falling Soufflé!
Wouldn’t it be nice? But alas, there are no recipes. We have no Julia Child. Successful professional writers are not withholding mysterious secrets from eager beginners. The only way anybody ever learns to write well is by trying to write well. This usually begins by reading good writing by other people, and writing very badly by yourself, for a long time.
There are “secrets” to making a story work — but they apply only to that particular writer and that particular story. You find out how to make the thing work by working at it — coming back to it, testing it, seeing where it sticks or wobbles or cheats, and figuring out how to make it go where it has to go.”
Read her full answer.