The definition of Consistency is 

"To be consistent" means to act or behave in the same way over time, showing regularity, harmony, or firmness, whether it's repeating an action to build a habit, maintaining a steady quality in your work, or having a stable character, with meanings ranging from steady performance (a team)

In my opinion it's the single most important part of success. Consistency isn't perfection it's small things that keeps things moving forward. Sometimes big steps sometimes small but it allows the room for progression.