- Preferring Composition over Inheritance (in general and except exceptions :)
- Keeping on asking myself: what is the one responsibility of this class/object/component?
- Spending a bit more time on naming things
- Have a side-project! It's a fun way of learning new things (my current one is https://www.ahoymaps.com/ - I could reuse many things that I learnt also in my 9-5)