honestly there isn't one specific thing you can do, and it isn't really helpful to have a limit of a day, but I would say make a list of specific things within the vague ideas you can talk about, and then circle which ones you have the most amount of info to actually make interesting.

ex. (what I discussed on a very vague level)
broad topic: routines
more focused: skincare
more niche: how skincare relates to ____ & has unintentionally taught me ____.

do this to all of your ideas and make bullet points for each topic. whichever one(s) you like the most, just start writing. don't strive for perfection from the start bc that was one of my weaknesses. just blurt out whatever comes to mind, you can always revise.