Reply To: Good Haskafah Sefer

six constant mitzvos

aish.com search 48 ways to wisdom- amazing

http://www.aish.com/sp/48w/

R tatz is great but hard

19 letters is good

bilvavi mishkan evneh

“In All Your Ways” Translated and Adapted by Rabbi Eliezer Shore bt rav yaakov meir shechter