Saving my superficial peroneal nerve

It appears a lifetime of sitting with my left leg tucked under me has resulted in prolonged damage to the aforementioned nerve in my leg. Symptoms are tingling, off-and-on numbness and, when the nerve is compressed, weird rhythmic vibrations on the outside of my left foot.  It's like someone turned the bass way up under my skin. Unnerving. (Ha!  Get it?!) The cure? B-complex vitamins and - here's the next-to-impossible part - no more leg tucking or sitting cross-legged (my go-to positions in practically every domestic seated scenario, except at the dinner table.) For the the past few weeks, I have tried to break myself of this lifelong habit. It takes a level of in-the-moment consciousness I haven't experienced in years. That can't be all bad, right?