Best investment opportunities available only on rare occasions so be prepared

The way of the successful investor is normally to do nothing - not until you see money lying there, somewhere over in the corner, and all that is left for you to do is go over and pick it up. That is how you invest. 

You wait until you see, or find, or stumble upon, or dig up by way of research something you think is a sure thing. Something without much risk. You do not buy unless it is cheap and unless you see positive change coming. In other words, you do not buy except on rare occasions, and there are not going to be many in life where the money is just lying there.