Self hypnosis has always worked for me. I learned it ages ago.

Here is a book by the author I used (his old version is out of print)..

http://www.artashealing.org/ahfwbio.htm
Healing with the Mind's Eye

Self hypnosis is easy to learn from a book for some, but not
all. People who do not have innate talent with this, may need induction tapes or a few sessions in person with a licensed
hypnotist/therapist.

I learned it years ago to improve my artistic imagery...little did I know it would help with chronic pain.

The smoking? This is something that you need to address.
Smoking in males especially reduces the blood flow to the legs and feet and may develop into intermittent claudication eventually.
http://www.vascular.co.nz/intermittent_claudication.htm
The link of this to smoking is well known.
Being a diabetic is another risk factor.