To my complete amazement, I'm expected to live to be 89 years old.

Well, that's according to an online life expectancy quiz called Living To 100, which I stumbled across while scanning CNN's website.

As optimistic as this prediction is, I'm skeptical. Generally, my habits are okay, but I know that I could make lots of changes (like just saying no to cheese) that are likely to prolong my life.

So, I went in search of a second opinion and found another life expectancy quiz on MSNBC's site. According to this one, I'm going to live till the ripe old age of 97. (This one is geared towards retirement planning, so I'm assuming that they were more generous with their calculations.)

Both quizzes are short. I resisted the temptation to fudge my responses and answered the questions honestly.

There are a few things I do that bought me several years. I don't smoke, always wear a seatbelt and try to not stress over little things (although it doesn't always work when I'm stuck in traffic.)

Still, I have several bad habits that I could improve on -- and making these changes could slow the aging process.

For instance, I don't exercise daily. I eat white bread once-a-day and like chocolate-y desserts. When it comes to barbecue, I go for the charred bits. Sometimes, I forget to floss. And, like pretty much everyone else in the country, I could try to get more sleep.

Overall, though, it's a pleasant surprise to realize that the positive habits we do have can make a significant impact on our health, even if it comes from an online calculator.

Personally, I don't put much validity in these quizzes, but it's still reassuring to see that I'm doing some things that may help me live for century. Even if there's no way to factor in the random-but-deadly lightening bolt that could have my name on it.

While these calculators put my mind at ease (at least momentarily) about my health, they did cause me to worry about something else: I really need to stop buying shoes and put more money into my 401-K plan.