Paranoia
Be careful, especially of unsolicited email. Some of the best scams use social engineering to make you do what they want. I've put links to a few of the best examples below.
- Westpac Bank ← Sophisticated and brilliantly executed scam
- Ebay ← Ebay scam
- Microsoft ← Swen virus
- Paypal ← Paypal scam
- Site Notice
- An excellent site to show you what's out there: AntiPhishing.org.
- Australian Government ScamWatch site.
- Most scams listed before you see them: Internet Scam Busters.
A little paranoia pays dividends online.