What is the obstacles or traps in meditation to not be effective?

I'd say you not being comitted and somewhere else with your mind or distractions from elsewhere. With guided meditation it can also just not be your style and in that case the voice might bother you and ruin the whole session.

Daydreaming or being distracted by other thoughts can make meditation ineffective. To stop this, just try to snap yourself out of it and think of the topic at hand. Guided meditation can be your best friend here as it gives you a topic to think about and helps you to stay focused on your meditation. MyLife is a wonderful app for this. I hope this helps you and I hope you have a fabulous day!😊👋