How to learn ABAP OO best practices

Hi

I'm familiar with ABAP OO in a way that I can use it when I need to, but when possible I prefer to use classic ABAP.

In classic ABAP I don't have to think much before I program a solution, because I simply know like the back of my hand what is best practices and what will do as a quick-and-dirty.

Can you suggest any resources, tutorials, blogs, articles etc. that will bring me closer to a similar level of knowledge about ABAP OO.

Best regards

Thomas