Affirmations/vision boards/law of attraction? Good ways of uncovering/defining tools?

Just wondering what the LCS’s thoughts are on affirmations and vision boards? Are they useful? I’ve gotten into the Abraham work recently, suspending my scientific scepticism and wonder if there’s good experiences behind this? Are affirmations useful? Does Law of Attraction work? Are these just woo-woo? I do find the Abraham stuff a stretch at times though am also quite stunned by anecdotes of it working.
Are such methods useful tools? Are they useful means by which to focus? Must one believe for them to work?
Thanks 🙂