Anhinga anhinga

mind_hacks and cognitivedaily report on a study that suggests that thinking quickly could boost your mood.

This sounds plausible and seems to be supported by an experiment where people were asked to read at different speeds and report on their mood afterwards.

http://www.mindhacks.com/blog/2006/12/think_fast_feel_grea.html
http://scienceblogs.com/cognitivedaily/2006/12/depressed_think_faster_thought.php

I am reading a very nice cognitive science book, Mind Hacks (this link contains a few cool sample chapters).

I was surprised to learn that the whole "subliminal advertisement" thing is basically an urban legend, although it is so widely believed that there are even laws against it in the USA. "Hack #82" says that in reality the effect here is weak and simple.