A friend asked for tips so here are seven. I've written four novels, 8 non-fict, inc best-selling novels Elephant Moon 200,000 copies and Cold, 60,000 + n/f Scientology:Church Of Fear 25,000.
First, plot your book in your head. You need a worm of a story.
Some plan every chapt. I'm too lazy/like fun of not quite not knowing where we are going. Non-fiction is easier than fiction.
Second, write. I try and write 1,000 words a day. Often fail but that's my goal. To egg me on, I update daily total at the top of ms.
Three, follow Orwell's six rules of writing: (i) Never use a metaphor, simile, or other figure of speech which you are used to seeing in print.
(ii) Never use a long word where a short one will do.
(iii) If it is possible to cut a word out, always cut it out
(iv) Never use the passive where you can use the active.
(v) Never use a foreign phrase, a scientific word, or a jargon word if you can think of an everyday English equivalent.
(vi) Break any of these rules sooner than say anything outright barbarous.
Four: don't assume reader knows all. Non-fiction: explain things clearly. Fiction, when someone walks through the door, paint them. How do they look/smell? Brilliant creepy moment in Eric Ambler's Cause for Alarm when baddie wears rouge on his cheeks. Yuck.
Five: To pitch non-fiction, write 1,000 outline and 9,000 of first chapts. Fiction: you have to write the whole fucking thing. 75,000 usual minimum. Novels are harder but sell better. Market is listless coz of virus. Publishers are holding back best-sellers.
Six: Agents are great but if you can't land one, get your pals to read and listen to them. You can self-publish.
Seven: writing a book, like having kids or planting a tree, gives you a kind of immortality. Throw a party on publishing day. Good luck.