A basic story idea
Printer (preferably laser) with plenty of paper
Three Ring Binders (2) with separating tabs
Build Your World and Characters
For most writers, this comes naturally. If you're having some issues, there are plenty of tutorials, guides, aids and groups available for assistance. For the purpose of this guide, you should have your world built and at the very least your main characters devised. Having secondary characters planned will get you bonus points!
Print Character and Plot Sheets
Each character should have their own sheet (keep the backs blank, they're a grand place to keep extra notes and page references). It's not necessary that you fill out every single line of the character sheet. Fill out only what is necessary for the character/plot. Feel free to add to the sheet as your write, too. The sheets are there for you to fall back on when you get 30,000 words in and can't remember what color your protagonist's eyes or you suddenly have your antagonist talking to his mother that you killed off in the second chapter (assuming you don't have ghosts in your story).
Each scene/chapter, like characters, should have it's own sheet as well. This one isn't as lenient as the character sheets. Simply because scenes can't be treated like characters. Every scenes needs to have a moment of importance. Something that either moves the plot or exposes a character trait. You'll need to list characters (definitely main, and if there are any secondary), importance of the scene (what does it do for the plot), key dialogue, vital information received and even the mood of the scene.
Do not feel like you have to have every single scene plotted. Start out with what you already know and add in as the scenes come to you. Like the character sheets, leave the back blank so you can add in extra details down the road.
If you don't have character and plot sheets, check the comments below for links to my own sheets.
Create Your Binders
You'll need two. I always buy the same color binders so each novel is color coated. One binder is for your characters and the other is for your plot.
Keeping your characters in alphabetical order is the easiest way to find them later. Use the separators to have three or four bulk sections (for example, A-E, F-J, K-R, S-Z). If you have visual references for your characters, their clothes or jewelry, keep that information with the character sheet.
Arrange your plot sheets in chronological order. Separators can be used here too. Keep it simple: Introduction – Point of No Return, Crisis (this is the meat where you're constantly putting barriers up for your protagonist to knock down – remember that each problem needs to be harder than the last), Protagonist vs Antagonist and finally your Wrap Up.
Now that you have your world created and your plot planned out, it's time to sit down and do the actual writing of the story. Use your plot sheets to guide you and your character sheets for reference (when needed).
Print and Proofread
After you've written, print out your scenes and insert them into your binder. It's considered best if you wait until you've finished your first draft to go back and proofread. That said, if you hit a slump and ideas just aren't coming to you, it often helps to go back and read over what you've already written. Many times you'll catch a hole in your plot, or even change what you originally designed. As long as you're not constantly changing your plot, it doesn't hurt to look over what you've already written.