Here's a series on articles about Genre writing. Whether you want to write a mystery, a sci-fi adventure and a story surrounded by magic and mayhem. One of these article may help you get started.
What is a Mystery?
So You Want to Write a Thriller
A Few Things to Keep in Mind When Writing a Romance
Take a Wild Ride in The Action/adventure Genre
The Western: The Retelling of How The West Was Won...or Lost
Creating a Science Fiction World
The Magic of Fantasy Writing
The Mysterious World of Horror