I often "know" things before they happen. It's usually some tiny unimportant thing--"If I put this glass on that shelf, it's going to fall off and break," and then exactly that happens. It's just a split-second sort of thing, but I've learned to pay attention. Saves a lot of broken glass. I've also learned to pay attention to intuitions about people. I was once very leery of a potential business partner who came highly recommended, who caused us a huge amount of grief and lost money. But it doesn't always work. I hadn't a clue about another business partner who was even worse. (I no longer have ANY partners.)

I have also sometimes know about serious illnesses in friends before they appeared, but in other cases had no idea. I have come to the conclusion that brain waves must be something like radio waves, with different frequencies--some I can pick up, and others I can't.