How do you guys start organized with multiple businesses?

Hello all, I'm in the process of launching my second venture, and will have a 3rd after that, but I wanted some insight. I wanted to see what method you guys use for multiple businesses. More so the finance aspect of it. For example, if you have 3 different businesses, do you keep 3 different bank accounts? Do you just make 1 business name and like an enterprise and keep them all?

Long story short, what is the best way to keep all 3 business organized?

Thanks!

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