Yes> On starting the 401K ASAP when you qualify, and this is a very good time to buy in while everything is at a low value. If at all possible maximum contributions at 15%. There are tax calculators that are available at certain 401K administer sites you can use so as to dial your Federal and State income taxes so as to tailor those with holding amounts to suit your needs. My first 401K is with PG&E started in 1984 and was growing good. My second 401K with Calpine I started in 2002 and that also grew. Since 1984 I have learned how to manage my portfolios, and have kept 95% of my gaines in those Mutual funds, but I check on them at least once a week, and I constantly read about business issues pertaining to the economy. I do use the mutual fund retirement money market funds in both of my portfolios to keep my gaines when the economy turns south like this one did at the end of December 2007. I have about 10 years now before retirement.
When the economic turn up comes, I will disperse my gaines from my money market into the funds at their low values and capture those gaines as they grow when the economy grows. As those who have already advised don't borrow from it as in taking out a loan against it ever. Good luck.