Whether you're writing a contemporary novel or a fantasy set in a make-believe realm, there's always going to be some aspect of "worldbuilding" to your writing. How extensive it has to be depends on your story.
Here are some helpful links to...well, help. Enjoy.
Chuck Wendig's terribleminds blog: 25 Things You Should Know About Worldbuilding
Belinda Crawford: A World-building Template for When You're on the Go
Belinda Crawford: The World-building Leviathan and a Scrivener Template
Holly Lisle: How Much of My World Do I Build?
Victoria Strauss: An Impatient Writer's Approach to World Building
Rebecca Zanetti: Five Blunders Authors Make in World-Building
Mellanie Szereto: Worldbuilding
Washington Romance Writers: Worldbuilding for Writers
SFWA: Fantasy Worldbuilding Questions
Sisters in Crime: One Writer's World-Building Tools