Bankrate (bankrate.com) has some pretty good Frequently Asked Questions answered about a 401(k) account: basic but fundamental. Check it out if you are unsure what to do when you change your job; when you can take a loan on 401(k) — yes, you can; how to allocate money in 401(k); how to diversify; and more.
FAQ about 401(k)sBy Bankrate.com