An approach that is very powerful is The Work. Similar to CBT, it is based on questioning our thoughts and beliefs
This whole concept sparked my interest, I went out and got the book "loving what is" today. The concept sounds simple enough. but what I cant wrap my head around is: if the whole point is to let go of any preconcieved beliefs on why something causes you pain and to basically just be. How do you apply it to a marriage where your spouse is having an affair? ie. if you remove all preconcieved notions that your spouse having an affair should cause you pain and you should want to change them to not do it. Then theoretically eliminating those beliefs would leave you accepting that their actions does not cause you any pain. So what do you do? carry on with your spouse not worrying about their infidelity? or what! I dont get that?