Here's an article from way 2013 that deserves a revisit. It's called Top 10 Ways to Be Innovative In the Workplace from Leadernomics.
It shares some thought-provoking tips. This one, in particular, piqued our interest:
Keep asking questions all the time – keep challenging your bosses and colleagues as well as yourself by questioning every part of your work. When you ask questions, you trigger people’s minds and force them to think about a particular problem. That way, they will be able to see what is really wrong with the issue and how they can change it.