Another thing I would recommend is using OpenDNS servers and register for an account with them then setup your
computer or router with their DNS address and in registering for an account it gives you the ability to setup filtering for things like porn sites or social networking sites phising attacks and in alot of cases speed up your browsing.
Browsers
Use a browser other than Internet Explorer like Firefox Opera or Google Chrome, Internet Explorer has allways been the least secure browser IE8 has improved but still falls behind other browsers not only in security but web page rendering as well.
User Accounts
Don't use your administrator user account for web browsing and e -mail set up a limited account for that. Most malware needs admin prevlidges in order to execute if you are using a limited account chances are much lower that you'll end up with a serious problem this is a major flaw with Windows the default user account has admin privlidges most people don't know to set up a limited account or don't want to switch between accounts but it will help.
Caution with E-Mail Clients
Another thing to do if you use for example Outlook or Outlook Express or even Windows Live Mail or any mail app
with the preview pane feature turn this option off with preview pane turned on it automaticly opens e-mails as you select
them and downloads any content they might have this is a good way to get infected if an infected e-mail were sent to you.
Remember curiosity killed the cat we all recieve e-mails with PowerPoint slides or Windows Movie Files,YouTube videos or links to external sites that may be infected just remember those sorts of things are the most common type of infected e-mail attachments so stop and think is it worth possibly infecting you PC just for a cheap laugh I delete 90% of the e-mail I recieve without ever even opening it I reserve e-mail for important stuff not entertainment better to be safe than sorry!
Porn,Warez, And Filesharing
Visiting Porn sites Warez sites and Peer to Peer file sharing networks for everything from music to movies to everday software with applications like the popular Limewire are one of the highest risk things you can do it's not a matter of will you get infected but when and it's usually sooner rather than later. If you are determined to visit these kinds of places be prepared to pay the price!
The Best Defence Is A Good Offense
Remember you can have all the security software in the world but if you don't know how to use it then you'll find
yourself in trouble I have found there is a trade off between security and usabilty for most users the programs that are
the best tend to be complex and alot of times the user is the one that makes the difference when you get an alert from
the AV or firewall for example and you click allow when you should have clicked block or deny or remove what ever
the case maybe making the wrong choice could spell diaster so slow down don't panic read the alert if you are not sure what to do ask someone or google it or visit the user forums for that software there is allways info available if you know where to look.
Don't Click that Mouse
If your surfing the net and land on a website and windows pop up all of the sudden and it looks like a scan is running and it says your infected just close your main browser window this is a mistake so many people make when windows are poping up all over they tend to try to click those windows closed big mistake don't click on them anywhere it dosen't matter if you click yes no open close it's all the same that will start an istall of malicious script just close the main browser window if it freezes push the power button in and hold it and count to five and the computer will power down.
What The Bad Guys Know You Don't
The villians who propagate malware know human nature and they will allways taget all the popular places people like to hang out like Myspace Facebook Twitter Filesharing Networks Porn Sites anywhere they know there will be lots of people.
They know how people react to their fake security alerts they know your going to click everywhere your not supposed to when things pop up all over your screen saying your infected or that you not know any better and will give them your credit card number to register their rogue software they have infected your machine with because you just want it to go away just don't panic that's what they count on just stop and get help.
Additional Info
If you have taken the time to read all this please visit the "Infection Definitions" page for an even better understanding of what the various infections are that can find their way into your computer I hope this helps to inform you of things you can do to improve your security level.