Collecting ideas of articles and keeping them for later is maybe not really that effective. During the day, many ideas come to us, sometimes related to the current context, sometimes not at all. Those ideas spark curiosity in us. And thus comes the urge to write.
If you decide to write down only the idea without any fluff around it, and keep all context and details for later, this spark of curiosity and motivation will just fade out.
You absolutely need to write and develop the idea soon after it emerges in your mind. That’s crucial to one, actually write about it and make it an actual blog post, and two, utilize this desire of knowing more to write something genuinely interesting.
At least that’s the way I see it, and this was the case for this small article!