You could take a route similar to how you train your brain to notice that you are dreaming. Basically, start making it a priority in your mind to notice these

You could take a route similar to how you train your brain to notice that you are dreaming. Basically, start making it a priority in your mind to notice these ideas by creating a habit to think about them intentionally. Take some time everyday to write down any and every idea you have for a software that would help solve something, anything. It's not the ideas the matter, it's about training your brain to make them important. If possible, do it multiple times a day. Fast forward a couple weeks and you'll be writing down that "insignificant" idea you just had!