In general, unless you plan to be Danielle Steele and write the same book a hundred times with a slightly different cover scheme, you're going to have to be more original. While she's probably making a shitload of money, she's not going to be remembered in the literary canon. That's typically how the tradeoff goes, you write pulp shite, you get famous now, or nobody cares about you. You write excellent stuff, you don't get any attention until 50 years after you're dead. But then they love you forever.
But I digress, if you want to write well, you should write often. Just like other disciplines, you improve with exercize. Write a lot of short stories, write a lot of characters, scenarios, etc. When one of them seems like a winner, expand on it. Develop your epic. An excellent resource on writing, authorship, the process of publishing, and work in the fantasy/SF world is Gene Wolfe's "Castle Of Days". The entire second half of this book is dedicated to his extensive advice to would-be authors, from the perspective of his personal experiences and those in the field. And he has a LOT of experience. I'd easily recommend it above any "For Dummies" book. Because Dummies don't write well.
So to be short, you should practice, and it will come to you. And at least try to be somewhat original.
I'll try to think of something...horde and alliance! chaos and order! haha sorry I'll actually try here, writing books is really fun.
(opens black metal song titles catalogue)
