There's no way to predict for certain what will cause someone to develop generalized anxiety disorder, but you can take steps to reduce the impact of symptoms if you experience anxiety:
Get help early. Anxiety, like many other mental health conditions, can be harder to treat if you wait.
Keep a journal. Keeping track of your personal life can help you and your mental health professional identify what's causing you stress and what seems to help you feel better.
Prioritize issues in your life. You can reduce anxiety by carefully managing your time and energy.
Avoid unhealthy substance use. Alcohol and drug use and even nicotine or caffeine use can cause or worsen anxiety. If you're addicted to any of these substances, quitting can make you anxious. If you can't quit on your own, see your doctor or find a treatment program or support group to help you.