My therapist got on a mindfulness kick a few years back. I humored him for awhile trying to keep an open mind. I read a book he recommended and tried some of the exercises. I found it rather useless for me personally. I wasn't in a place anymore where I was dealing much with anxiety or ruminations (which is where perhaps mindfulness could have been a help if he'd introduced it at that time). I already had developed methods of calming my mind that didn't seem so contrived and hokey to me, so it just seemed like a waste of session time to work on it in therapy -- kind of too little, too late. Eventually I just pretty much forbade him from bringing up the topic of mindfulness because it just didn't have clear relevance for me and it frankly pissed me off to waste time on it; it felt off-topic and came off as a disconnect because it really wasn't what I needed or wanted at the time (like I said, it probably would have helped moreso years earlier than it did at the time he started bringing it up). Fortunately, he respected my opinion and backed off.