Parents of multiples, what's something that you learned with your first that made the experience with your second easier?

And, likewise, what's some advice that you thought you could apply to your second based on your first, but didn't end up working out (e.g. your second's sleep behavior was totally different)?

I'm pregnant with my second and have definitely learned a lot from my first, but I also don't totally expect the second to have the same eases/struggles as him. I'd love to hear your experiences!