I was recently on courses + yesterday revised
Fargo .
And I wanted to post a
picture from one of the slides from the courses:

It shows a number of motivating factors. Colors mean:
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green - how much motivation grows, if the factor is
blue - how much it falls, if there is no factor.
I had never thought about such a classification before. And now he looked and it seems to me quite logical.
The theory of the 60s, but it also perfectly explains the modern gaming. People are crazy about virtual achievements (rank # 1 in the picture above).
Also to all those who have not watched Fargo - be sure to see. To bring a little balance against orientation on the bubble, as a way to achieve happiness.