If there’s something about your life you wish to improve – perhaps something missing that you would like to include, or something unwanted that you would like to release – the Teachings of Abraham-Hicks will be of value to you.  Your habit of resistant thought is the only thing that ever keeps you from allowing the things you desire.  And although you certainly did not intentionally develop these resistant patterns of thought, you did pick them up along your physical trail, bit by bit, and experience by experience.  But this is very clear:  If you do not do something that causes a different vibrational offering, then nothing in your experience can change.  (pp186-187  Manifest Your Desires by Esther and Jerry Hicks)

What can you do to cause a different vibrational offering?
You can sit down and write out as many of your recurring pessimistic thoughts as you can think of.  Then you can write out what a more optimistic and productive thoughts would be.  Then every time one of the former thoughts comes to mind, as soon as you catch yourself going down that line of thought, simply pull out your card.  Read over to yourself the replacement thought until it becomes your automatic response.  That’s one way to cause a different vibrational offering.