Are the seminars valuable or scams?

[Brian Orr]

I've heard multiple times on podcasts, people that speak of large value from continued education, conferences, seminars, etc... But i've also seen a few BP blog posts warning that they are scams... The one around here a lot is the Rich Dad education series. A 3 day course that's affiliated with Kiyosaki sounds great of course... 

Can anybody suggest a list of helpful seminars and conferences vs. ones we know are scams?