After my diagnosis I found a commenter in a forum claiming to be a doctor ask if anyone had checked their thiamine levels (B1). The commenter cited something about muscle function and thiamine. I didn't get mine checked but started a daily thiamine supplement and while I occasional feel tightness in the area I have had no episodes since.
For me an episode meant hours to days of extreme pain and vomiting leading to ER visits for potassium pumps and rehydration.
Avoiding super fatty meals, eating smaller portions than most people and cutting most all processed or prepackaged foods from my diet I think also helps.