With that kind of money, I would try to find a reputable financial advisor. Finding a really good FA might take a little time, but obviously you want the best. The FA needs to be
fee - based, i.e. charges you an amount for the time spent advising, NOT a percentage of your holdings,etc. As you can see from the above, there are so many opinions out there, plus the financial world is constantly changing in quick fashion.
I also feel you will do better if you are knowledgeable of whats happening in the financial/investing world, instead of being blindly ignorant. With three million, you can make it a hobbie to see that money grow.
Here is a website that is amazing. It's basically a bunch of financially conservative accounting types that seem to know everything about "passive investing," taxes, trusts, real estate, etc... Most of these retired folks are big tight wads and for someone fairly young, it might be too conservative investing advice. You want to capture some growth in your portfolio. http://www.bogleheads.org/
I also like Seekingalpha.com Lots of articles on what to invest in. A very wide range of quality, so always read the comments at the bottom of the article as a barometer of quality. Some amazing authors who I religiously follow. http://seekingalpha.com/
Rare earths are the future.