Keep asking what if… What if my character went here? What if my character did this? Jot down things that make you wonder and ponder.
Brainstorm with friends. Some of the most amazing stories can come just sitting and talking with another writer or friend.
Listen and watch. When you watch the news, ask “what if?”
Everything you see and experience is fodder for novels.
Take notes. You never know when inspiration will hit. When an idea comes, write it down. I have a file on my computer where I keep my writing ideas. I’m always sending myself e-mails on my phone with ideas for blogs or stories.