How to make my mac Flashback proof?

This came to my mind when I saw a flash update notification few minutes ago. How do I make sure that my Mac is not having the recently appeared torrents and its new variants? And, how can I make sure that it would not get its new versions of the trojan in the future (if they release any more variants)?

I know that a bit of common sense is enough to avoid damages by not giving permission to make system wide changes to the trojan. But it would be nice if we can make sure that the chances for it to get into my mac is minimized as much as possible (not by keeping the mac turned off 24/7, but by doing necessary configurations while having the ability to browse comfortably and minimizing the chances of getting infected).

Lets assume that my Java is enabled at all the places, including settings in Safari as well as the Java Preferences application.

Please explain all the necessary changes that should be done to disable java as necessary.

And any other tips that would enhance the online security would be appreciated.

I use Lion, MBP late 2011. I have installed all updates.

Thanks in advance.

 

Did not read all the threads in the forum. I wanted quick guidance as I was confused whether I should proceed with the update notification I just received or should I not. Thanks for the reply.

 

Thanks for all replies. What difference would that make if I disable java from Java Preferences application instead from the browser settings?