Lucky Charms? Really?

A Wall Street Journal article yesterday on new research that suggests how lucky charms help people perform better:

http://online.wsj.com/article/SB10001424052748703648304575212361800043460.html?KEYWORDS=good+luck

Doesn't this just boil down to how lucky charms boost some people's confidence, and increased confidence helps improve personal performance?

Instead of, or in addition to, believing in luck, what can you do to boost your confidence?