I'm babysitting as my wife is out of town for the weekend. I asked her before she left if she had any rules.
She looked at me like an idiot and said it's just like looking after Gremlins.
"Keep him out of the light. He hates bright light especially sunlight. It'll kill him (use suncreme).
And keep him away from water. Don't get him wet (unsupervised).
But the most important rule, the rule that you can never forget... no matter how much he cries or how much he begs... never, never feed him McDonalds."