I find it important to eat small amounts many times a day. Not so much grazing but more like 6 small meals a day rather than regular breakfast, lunch, dinner. It seems to stop me from having those highs and lows and crashing after eating.

I don't eat carbs much any more. That's certainly helped me, but everyone is different. I have a lot of residual vertigo so having crashes after eating food doesn't help that at all.