Complacency can be defined as self-satisfaction especially when accompanied by unawareness of actual dangers or deficiencies (merriam-webster dictionary)
In health and safety, complacency generally occurs with workers who have been operating in a specific role for a long time and have become laxed about their duties.
What to do about complacency?
1. Analyse your job tasks and the way you do them, do you still utilise the same precautions that you did when you first started the job?
2. Have a coworker observe you to identify some shortcomings while conducting your task. Be open to constructive criticism.
3. Stop taking shortcuts that you may have developed over time. Shortcuts may be dangerous and the probability of an incident still exists.
4. Make it a habit to retrain yourself in doing the right thing, the right way. Doing something over and over forms habit.