I like the first 3 suggestions, the rest are something between optional, recommended and spam. However, arguably the most important suggestion is missing: always run your computer with a limited account, no matter what OS. Running as root/administrator is that begging for trouble. Most malware you get infected with runs in the context of the logged on user, so whatever you can do to fcuk up your puter, that's what the malware can do. Google the Principle of Least Privilege.

"If you think technology can solve your security problems, then you don't understand the problems and you don't understand the technology."
- Bruce Schneier