Preprations for US

I’d always been under the impression that entering US is not an easy task , I had to go through TSA , Homeland Security and ofcourse INS and Customs . America is not new to me having spebusiness nd good carefree years of my life there , from 1996 - 1998 living all by myself getting a degree in Management from University of Michigan , I knew my way around things but after 9/11 things had changed and I was afraid that what will happen .
To nprepare myself for the upcoming encounter with the Homeland Security and Customs I read all the pamphelets available at the TSA site , watched the videos but was still afraid of the upcoming .