Lessons learned may be of good use for those who still have jobs now.
1. Keep resume updated regularly
2. Notice any change in the company that may cause laid-off, especially after acquiring another company or any culture change
3. Try to keep work-life balance.
4. Keep healthy, both physical and mental health
5. Learn new skills if you are not planning to retire soon.
6. Connect to people, especially recruiters, HR, co-workers, or managers (current and previous).
7. Learn to do housework, and listen to/take care of spouse/family members.
8. Decide to use health insurance based on whose job will be more secure. If you are not selected then your 401K and stock/money market should be less than 25% of your income, and the whole family expense should be around 50% of your income. The rest of your income should be kept for emergencies or possibly laid off. The income from a person who has a secure job should be used only for backup or special occasions.
Only for your reference.