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It's all about being prepared. Preparing and cooking fresh low carb food and making sure to always have lots of that food with you at all times. Also asking people to be very specific about what will be involved if going out and being prepared to wait for people if they're doing things you can't, or to go home (if exercise/eating carbs/drinking alcohol etc is involved). Also, wearing a medical bracelet that says to administer glucose if you are having a severe crash or having a seizure. Being very clear in your communication with family and friends about what they can do if you're crashing, and giving them medical information to educate them if they don't understand the severity of the condition.