"I am going to lose weight," "I am going to quit smoking," Why don't these resolutions work?
I think our unconcsious does not recognize negatives because it sees things as images. The only images these thought evoke are images of weight and smoking.
A simple example is to asked yourself not to think of blue. Everything that comes to mind is about blue.
A similar idea is that we cannot "not do" something. We can do many things but what do we do to "not do" something. I learnt this very graphically when I was disturbing my wife's sleep by snoring. She would tell me to stop snoring and I would breifly stop and then start again. I was asked whose problem it was. Clearly it was her problem so I tried to think what she wanted me to do. Finally I concluded she wanted me to sleep quietly. So when she is disturbed by my snoring she says, "Jim, you are snoring, sleep quietly." It has work amazing well as I now know what to do.
Instead of being frustrated by what you do, think of what you would like to do and set a postive goal. You will be amazed at the success if you perist and really want to change.