If you’re serious about becoming a wealthy, powerful, sophisticated, healthy, influential, cultured and unique individual, keep a journal—don’t trust your memory. When you listen to something valuable, write it down. When you come across something important, write it down.

I used to take notes on pieces of paper and torn-off corners and backs of old envelopes. I wrote ideas on restaurant placemats, long sheets, narrow sheets, little sheets and pieces of paper thrown in a drawer. And the best way to organize all those ideas was to keep a journal.