I read something this morning that really made me think. Happy people do not always automatically make other people happy too. Nor can miserable people instantly cast a spell of sorrow over everyone they come in contact with although, more often than not, they do a good job of it.
There has to be a degree of susceptibility on the part of the potential recipient, however. It also helps greatly if the person who is feeling the mood has a genuine desire to inflict it on someone else.
I think that we all would do well to consider what we would most like to receive and then do our best to become the giver of that very thing. Who was it that said "we get exactly what we give", or something to that effect?