Please, add information how to change the default character set and collation into utf8!

I'm sorry for the mistakes I've made - I'm from Russia.
May be it is not right place to post this issue but still. The problem is that many people (personally know two people besides me) face the problem of changing the default character set from latin1 to utf8.
The most popular resource for solving this problem is http://stackoverflow.com/questions/3513773/change-mysql-default-character-set-to-utf-8-in-my-cnf.

As a result: I still can't find the right way to make my mysql service using utf8 character set.

Could anybody give the solution that will really work!?
I attached the screenshot of my server where mysql/my.cnf on left side and the result on right side.