Just as the saying goes: "Out of sight, out of mind." Most humans operate on autopilot to some degree during the workday and are highly susceptible to making one big mistake. This could be one click of the mouse or a single keystroke.
By consistently providing teachable moments, interactive content, and providing concise updates on cyber-attack trends, you can change behavior for the better and improve even your weakest links.
Remember that human error is unquestionably your biggest cyber risk.