How Do You Manage Monthly Income from Trading?

I've been trading for a while now and I’m starting to think more seriously about how to handle my monthly income from it. Some months are great, while others are a bit of a rollercoaster. How do you all manage your earnings? Do you have a system in place, or do you just take what you make each month?

Also, do you set aside a portion for re-investing or only for savings? I’ve heard differing opinions on whether it's better to reinvest profits versus keeping them for expenses. Plus, any tips on budgeting for those quieter months would be super helpful! Would love to hear how you guys handle it.