mentally tough teens by Justin Su'a He has the 144 character generation down. Each page is a short "chapter" on mental toughness. has a great podcast 5x a week "increase your impact" it's about 2-4 minutes long. I gave this book to every player on my 12 and 14 u teams. They all loved it. My DD looks at it regularly.
and for parents Parent Pep Talks-Justin Su'a
DANG! Did you guys buy all the copies of Mentally Tough Teens? Two sawbucks for a used copy!