5. Do Your Best Not To Cross Contaminate
It would be best if you remembered this thing when it comes to the big 8 of food allergies. You shouldn't use only one spoon to mix eggs and then a mixture of food for a person with egg allergies. Even if you're really careful, bits of the egg can get into the other meal. It's dangerous for a person with dairy allergies.
Maybe it can cross-contact an allergen from a different product, or containers without washing them thoroughly. It's better when you use separate storage containers for each kind of food.