推荐两个PS（not photoshop, but personal statement）指导网站

伯克利大学关于如何写PS的指导网站
http://students.berkeley.edu/apa/personalstatement/index.htm
UCAS（Universities and Colleges Adimissions Service ）的指导
http://www.ucas.com/students/applying/howtoapply/personalstatement/