[JohnFen]

That's a valid approach. Another valid approach is to make sure that you're eminently hireable instead of worrying about corporate politics or job security. If you're that, then leaving a company (voluntarily or otherwise) is no big deal because you can always get job elsewhere.

[macintux]

During a significant economic downturn, with lots of layoffs, there are no shortage of eminently hireable people who are still not hired.