Tips nulis dari Jonathan Stroud penulisnya, The Bartimaeus Trilogy, The Golem's Eye, & Heroes Valley
1. Practise: Write as much and as often as possible.
2. Experiment: Try as many different kinds of writing as you can.
3. Read: As above – as much and as widely as you can.
4. Persevere: Don't be disheartened by ideas and projects that don't work out. I've got zillions of half-finished things in boxes, assembled over many years. Individually they may not have been any good, but together they pushed me in the right direction.
When you're confident you've got something worth showing, send your material to several publishers at once, so you don't waste time if it's rejected. But check to make sure these publishers actually do the kind of book you're proposing! Don't worry if you get rejections, but listen to any advice.