PSM I cleared in first attempt.
After reading through this forum for tips/suggestions and iteratively & incrementally reading the scrum guide :) I managed to clear the exam.
1. You will need to read the scrum guide thoroughly. Highlight what you feel should be remembered and take side notes. I am a very visual person, so I drew block diagrams.
2. I read this - Scrum and XP from the trenches book/pdf. It was very useful to understand and appreciate how scrum is being used in companies like Spotify.
3. Take open assessments until you get 100% in less than 15 minutes at least 3 times. Read the scrum guide thoroughly again especially those highlighted portions.
and that's it... All the very best of luck.
May the force be with you.
Professional Jedi/Scrum Master