Murphy's law

Why is it that you end up with multiple choices when you don't care or are totally not expecting something? Why is it that when you badly need something, everything seems to go wrong? So I thought I'll pretend I have no expectations from life hoping that'll fool the playful ghost or God or chance and will give me atleast one thing that I need. Multiple choices would be good but that'll only confuse me trying to choose between "what's best for me" and "what I want". Also, I don't want to be greedy. Do people know of any other strategies to counter the actions(or the lack of it) by the playful one?