The reason that email scams work is that people fall for them... there is no way for them to be dangerous on their own.
educate yourself, be aware, and don't do idiotic things like give your banking info to someone who claims to want to give you 2% of a hundred million dollars! If you don't know that certain emails (or the web links contained in them) are scams, you probably shouldn't be on the internet at all.
I came this (fingers about 1/16" apart) close to falling for a really, really good one about a month ago. PayPal phishing scam said someone had bought and paid for something (multi hundred dollar item) on my account and fraud was suspected, click here to acknowledge...
I use Opera and hover over any link in these kind of emails, so I can see the true address in the status bar, and he actually had a pretty believable URL, so between that and being livid about someone supposedly ripping me off, I almost went for it.