Your memory is quite good but don’t overwork your brain to process too much information especially if you want to be productive.
So, if you see that advert, blog post, or anything that ignites a good idea in your mind, write down the idea no matter how vague it is.
You can always trust a notebook or your mobile device for moments like this. They are both excellent note taking tools, but I am a bit more tilted towards a notebook (just personal).
Jot down the idea, topics and tips as they might become your repository for growth strategies without stress of recollecting old memories.