Rubbish. Design Before coding. if anyone needs this advice he should be driving a taxi.
The last one is the only one anyone should need to hear. Since speed optimization is a compulsion people learn in those idiotic whiteboard interviews.
Here’s a real one. Demand uninterrupted work. Drop the agile/scrum/TDD horseshit.
And let’s go for it: write legible code. Now there’s a real heresy.