The Blame Game

Why is it when something goes wrong we go right into blaming? When you start having a negative attitude you blame the people around you? When something doesn't go quite right you blame it on someone else? Why don't we just take responsibility?
I know when I think of blamers I can usually think of a few people I know but I would never think of myself. But lately I have been reading Marshall Goldsmith's book "What Got you here won't get you there."
He has 20 rules that we should look into to get to the next level. Some of them you really don't think about until someone points them out to you. Last night I wrote down some things I have read in the book to work on. One was not to win too much by using the words no, but, or however. Today while playing cards my mind had to do a total double take. We were playing 6 person pitch and my team got the bid. We had it in the bag and should have taken all the tricks and one the game. Well the first teammate layed the card worth the most points and my other teammate assumed(make an a** out of you and me) was going to lay her high card so I threw a low card. Well turns out she didn't and right away in my mind I am blaming her instead of seeing that it was just as much my fault if not more my fault because I played after her. Isn't it crazy how your first instinct is to blame. I had to step back from the situation and reminisce to what I read. It really changed my outlook and I took some of the blame, where I should have just took it all. C'mon at least I took some of it which is a pretty big step for me.
I feel like when I am tired and being too negative and talking about others and not honoring the absent is when I fall into the blame game.
So for the next 2 weeks I am going to work at taking the blame and apologizing. Boy, I better get started, and you better too.