My information security career has made me very paranoid! For example, I only read my email in plain text to prevent any rogue links or other issues. I also use Firefox with add-ons like No Script and Ad-Block Plus. At home, I have replaced Adobe Reader with FoxIt Reader and I am in the middle of looking for an Adobe Flash replacement (Gnash seems appropriate).
I still use Windows Firewall because I've been lazy about finding a replacement, and I prefer to use OpenOffice at home as well.
In regards to hardware, I just bought a Kensington lock because I am bringing my laptop to school.
What paranoia have you been driven to since you know all the evils of the internet?
CISSP, GCIH, GCIA, C|EH, Sec+, Net+, MCP