- learn to fish, as the author mentions. Hunting is similar, and good for relationships, as is canoeing, camping, and general outdoorsmanship.
- buy a year+ membership at a cheap gym so you have somewhere to go a few days a week while you are off. The cheaper it is, the more social it will be. Think of it as social and mental health insurance.
- join volunteer, church, or fraternal organizations to develop cheap activity based relationships. if you are a committed atheist, join a secular volunteer organization, and barring those, a theatre or activist group.
- No matter what you hear about others, your severance will be a nasty insult and you will very likely have to spend to hire a lawyer to get what you are owed. Find one now and agree on a rate while you have a job.
- keep lines to recruiters open while you are still employed, even if they are obnoxious. Don't let them know your current/past salary ever, because they will just use your lack of job to pressure you down on the next one. For them to "have your number," literally means being at a disadvantage.
If you are unemployed or just about to be, it's very stressful, but it builds character, and for everyone I know who experiences it, living through it is always better than living in fear of it.