Stock market question, what are some stock trends that you think are coming?

This is a reference to my question
http://www.youtube.com/watch?v=X9hUseT2UMM

I think health awareness in the past years has taken a big increase in America , and these diet plans and the like have become like trends them self, do you have any companies or products you believe might get “hot” then “cold”?

Are there any particular companies that are “cold” or at a dip and think will come back up?

Also how do I buy stocks from these online social places like myspace,facebook,twitter etc…?

What other suggestions do you have? Please refer to a company if you can.