
Effectiveness is about using and doing the right things to achieve positive results, while efficiency is about doing things in the right manner.
Burnout, defined as the state of physical, mental and emotional exhaustion caused by prolonged and excessive stress, saps your physical energy, leaves you feeling more hopeless, helpless, and resentful of your job and even your teammates, and reduces your productivity.
You are less likely to use the right tools, techniques and technologies to complete the project.
When you know the causes, you can effectively treat the disease (i.e., burnout) and address the symptoms (e.g., lack of interest in the tasks).
Lifestyle causes: Do you work too much, thus, you have too little time for rest and relaxation?
Do you have a pessimistic attitude toward yourself or your world?