The secret is perhaps what it always is -
don't try too hard.
Lots of weird things have happened to me and those close to me, but
never when we expected them to.
Perhaps it's bound up with human nature, or physiology even. Like when couples don't conceive until they give up trying, and then -
Most of the weirdness that's happened to me has been either pointless in itself, or meaningful only to me and those close.
For example, since a group of family deaths last year, my family have had many experiences which are significant and comforting to us, but most of which I will not share on here as they are too personal.
So if anyone wants to experience weirdness, my advice would be
a. Forget about it for now and enjoy being alive.
b. When a small phenomenom crops up, such as a group of related coincidences, smile and enjoy it.
c. Don't push it. There may come a time when wanting to see a ghost is the least of your problems.
And carry your camera everywhere. You never know.