5) become an expert in A Field. There are lots of little niches where the programming languages and techniques change, but the core problems of the field stay

5) become an expert in A Field. There are lots of little niches where the programming languages and techniques change, but the core problems of the field stay the same. Deeply knowing a particular corner of the industry can serve you well, partially because you know the nuance of the problem space and partially because you will start to know the relevant individuals in that space. Examples: Fintech (consumer), Fintech (enterprise), High Frequency Trading, Media (video), Healthcare, Advertising and Ad Platforms, ....etc