I’ve been in marketing for around 5 years (sorry, not decades!), and what follows is what I’ve learnt in that time about being a good marketer and developing your career.
At the heart of a good marketers mindset is the principle of ‘kaizen’. Kaizen is about continuous improvement and has been applied to countless businesses. You never accept that good is good enough, and you don’t believe in perfection. To summarise it in three words: Never. Stop. Learning.