The way I do it is two things. The first and most obvious (as most state) is to just live your life normally, and think about the things you are doing or observing. Why am I doing it this way? Is this the best way? X is so boring/tedious, surely there is a better way.
The second way is to read - not just articles or HN, but novels or non-fiction are another source for me. It functions in the same way as the first: chances are the main character or at parts in the story you will notice things that seem impractical. I noticed this while reading case studies at school, the authors usually explicitly point out that "this industry was fragmented" or so forth.
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The way I do it is two things. The first and most obvious (as most state) is to just live your life normally, and think about the things you are doing or observing. Why am I doing it this way? Is this the best way? X is so boring/tedious, surely there is a better way.
The second way is to read - not just articles or HN, but novels or non-fiction are another source for me. It functions in the same way as the first: chances are the main character or at parts in the story you will notice things that seem impractical. I noticed this while reading case studies at school, the authors usually explicitly point out that "this industry was fragmented" or so forth.