Start asking employers how much notice they give for layoffs/termination

Do this in job interviews before you start, take it into consideration even if you decide to take the job, the policy they have should inform how much notice you give before you quit. If you know going in that they will get rid of you without notice then they don’t get notice when you leave. If they will give a week’s notice you give them one week instead of two. Give them only what they give you.