I have always been really lucky when it comes to finding four leaf clovers. Sometimes I even find clovers with 5, 6, or 7 leaves!
Did you know that the extra leaves are due to a mutation?
When you find an abnormal clover: keep searching the patch. There are likely other mutated brothers and sisters hanging out nearby.
I guess you could say it's not so much luck that I find these, but knowing where and how to look.
And thats fine by me: I'd rather find my own luck than wait for it to find me.