Choline is the precursor for making acetylcholine.

Foods remain the best source for this.
Here is a list:
http://nutritiondata.self.com/foods-...000000-1w.html

You can see egg yolks are very high.

There are drugs called acetylcholine agonists... these are reserved for dementia patients. They have serious side effects including vomiting and diarrhea. I don't think you mean these.

Most lecithin supplements are omega-6's in an oil form, and that would skew your Omega-3 ratio further in favor of inflammation so are not a good idea.

Some health food stores sell lecithin granules, which you can use but they go stale very quickly. Deteriorate rapidly in hot environments. Keep in the frig therefore
http://www.drugstore.com/products/pr...la&kpid=320139

Foods high in choline are your best bet. Some children's vitamins now contain choline.
This is what Dr. Weil says about choline:
http://www.drweil.com/drw/u/ART03240/Choline.html

I would caution against eating beef brains however, as the risk of prion disease is too high. Liver also is problematic as toxins accumulate in liver.

Two eggs each morning would be very easy to do and very inexpensive, however. In the US we have Omega-3 eggs too...like Eggland's best.
http://www.egglandsbest.com/
But there are other brands now.