Quick Credit question

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I'm only 20 years old at the moment, so I haven't had enough time to get a really good credit score just because of that. I've never had any late or missed payments and pay over the minimum every time...pretty much i'm doing everything right. I got my FICO in July and it was a 674 which isn't HORRIBLE, but I want it alot higher so I can get a good rate for my first real estate deal

Anyway..I heard that for people like me, I could get authorized under some1 else's credit card and I would automatically pick up their years of credit. For example my dad has good credit and I'd be able to get authorized as a user under his credit card and therefore pick up all his years of credit history

Anybody know of this is true? If so, how would I go about doing that? Just having him call the credit card agency?