As another year comes to an end, What is the One thing you wish you had done differently with your system ?

[Schraufabagel]

My mistake was diving into too much livestock. I should've stayed simple with mainly softies and euphyllia in my tank. I've had lots of LPS die since I started my tank. Additionally, I should've stuck to ordering fish online. Every fish I ordered from my LFS passed away within a few days.