Help with prep for a few cleps

Hi all, today I took my second CLEP analyzing and interpretating litarature... passed with a score of 68. I also took US History 1 and passed it with a 59.
I am looking to get four more CLEPS out of the way. US History 2, Western Civ 1 and 2, and psychology.
For US history 2 I bought Barron's EZ-101 Study keys AMerican History, 1877 to the Present. Is this a good study tool? should I use anything else?
Does anyone have any pointers for what I should use to study Western Civ 1&2 ann psychology.
Also if anyone has taken these exams, how long did you prep for? and did you find any of them hard?
Thank you so much for your help!!

 

Free Clep Prep.com

 

A good and cheap way to prep for CLEP and DANTES exams is to go to a local community college bookstore and buy used books for the corresponding course. For example, get the book for Intro to Psychology/Psychology 101 for the CLEP Psychology exam.

 

thanks!
any idea how long I should study for any of the CLEPs i listed above?