i don't have book suggestions, but a few thoughts:

first, the usual:

- get more sleep

- cut sugar

- cut alcohol

- cut web surfing

second, some great ideas on how to manage time/tasks in these articles:

https://theweek.com/articles/444385/how-most-productive-pers...

http://calnewport.com/blog/2015/11/03/spend-more-time-managi...

http://calnewport.com/blog/2014/08/08/deep-habits-plan-your-...

https://www.scotthyoung.com/blog/2007/10/18/the-art-of-the-f...

http://calnewport.com/blog/2013/12/21/deep-habits-the-import...

third, read books (5 hours/wk is a good goal if bookrading not already in your schedule) -- make a book list and read actual books (if you're not already) - great fiction, science, philosophy, etc. and reread the ones that resonate with you.