Have you read The Amateur's Mind? How to reassess is based on the concepts presented in The Amateur's Mind. Probably best to do them in order. Let's see what a quick forum search turns up:
http://www.chess.com/forum/search?keyword=how+to+reassess+your+chess
Amazing what a forum search will turn up, eh? 
Would you recommend reading the book? What topics does the book cover? Is the textbook or the workbook better? Thanks in advance