use anti-vir, a decent browser and common sense. that's more important than complex 16digit passwords and shit
My brother has played one pretty popular mmo 1-2 years ago, and their user account database was compromised (i'm thinking just sold) and went off to the internetz.
Next thing you know - he got his email and some accounts hacked too. That was a good lesson for him.
So you here you go.
if you use your paypal pass for games then see
if you use windows firewall on xp with java 5 then see
also it could've been not an email but any other associated service/account, so