The good folks over at TUAW (The Unauthorized Apple Weblog) have a whole series on securing your Mac.
This was published a while ago but since it is still something good to take a look at and bookmark-worthy. While Macs are still less troubled by security issues than PC's, there are still some things you can do (and things to look out for) to keep safe.
While you are there, don't miss the link to increasing your safety while surfing on unsecured wifi networks. I personally avoid "free" wifi networks because of privacy concerns... you never know who is watching as your check email and do your online banking and keeping track of your info...
I hope you have a great Christmas... it' time to go unwrap presents with the kids... woohoo!
