Low carbohydrate diets continue to expand in popularity because they work and taste great. Tons of recipes out there, and some good websites have already been listed.
I started a ketogenic diet many years ago, originally for weight loss. (lost 70 lbs). However, the big bonus for me was the elimination of migraine headaches. I used to get 1 to 3 migraines a month on average, but now haven't had one in years.