To add to Masia's informative suggestions; using a more complex password is great, especially in conjuction with some buffed-up computer security.
I VERY strongly advise everyone makes sure that they have their Flash updated to the most recent version, since there's a vulnerability in some older versions. Also using Firefox or other free browsers that aren't Internet Explorer, and then using available security plugins all adds up to much more security.
I personally keep my Firefox and Flash up to date, and have Firefox plugins such as "AdBlock Plus" (with a filterset updater set to automatically and silently update frequently), "FlashBlock" (further reduces the chance of Flash vulnerability exploits), and "NoScript" (can sometimes be a pain, but worth it for the sheer increase in safety it grants). There's also the program Spybot Search & Destroy, which has fantastic capabilities for detecting and cleaning any nasties from your computer and comes with a little application that runs in the background of your computer, called "TeaTimer"; a total godsend that can stop almost anything negative from running on your system if it actually gets on. I've seen it block more malware than any virus guard or other security system I've ever used.
Between that lot above and an obscure alpha-numeric-with-punctuation password, I've never had anything I've ever used hacked or seriously compromised.
Edit: oh, and I have the Authenticator as well, which adds to the overkill, but hey, better safe than sorry