Great book that has guidance about all personal improvement strategies. Even goes into a strategy to buy good clothes, necessary to look and act the part you want to be, simply spend more on less things. Lots of good content, highly readable and highly recommend.

book review
Unbreakable by Ronnie O’Sullivan
Key Lessons from a Snooker Legend Ronnie O’Sullivan is widely regarded as the greatest snooker player of all time, with a record-breaking career spanning decades.