What causes a person to experience stress and how could one handle it effectively?

Chronic illness or injury.
Emotional problems (depression, anxiety, anger, grief, guilt, low self-esteem)
Taking care of an elderly or sick family member.
Traumatic event, such as a natural disaster, theft, or violence against you or a loved one.

Set aside leisure time.
Do something you enjoy every day.
Keep your sense of humor.
Take up a relaxation practice.
Don't over-commit yourself.
Prioritize tasks.
Break projects into small steps.