There has to be some kind of 'rule' / guide on the adding of 'po'. Myśl / pomyśl? What is the difference and how should I understand how and when to use each?
verb "myśl" is appropriate for present 'thinking'
eg. On myśli o swojej żonie.
verb "pomyśl" is appropriate for future 'thinking'
eg. Ja pomyślę nad rozwiązaniem.