I have been thinking a lot about attitude lately and people's attitudes toward life. I believe that your attitude toward life really does reflect in your success as a person. Not always in a monetary way, but always in the value of the friendships and relationships in your life.
I read this quote by Thomas Jefferson and it seemed fitting to my thinking as of late...
"Nothing can stop the man with the right mental attitude from achieving his goal; nothing on earth can help the man with the wrong mental attitude."
In conjunction with that I have observed that the most un-happy people that complain about others are usually the one that have a negative outlook on life in general. Learning to be happy with the life in front of you is one of the only ways to move forward. Keeping your eye on only the negative will keep you sinking further down.