It's how I express myself after learning things!
For example, I've been into soap-making for a while. Then I imagine...... what if I transmigrated into a distant fantasy past? Can I use my cultivation skills to make good soap? Qi to extract herbal oils and use them in cultivation soaps? How would I promote my special soap? If I can't make my own moulds, do I hire martial artists or ask my shixiongs and shidis to help me out?
Stuff like that! A bit of magic into everyday life!

Not that I'd post them, of course. I honestly don't think anyone would read those scribbly journals of mine. They don't have plot - it's all world-building, and a lot of sketches of cultivational soaps.......
Oh yeah! I wanted to own a boutique in a Wuxia world too! Fire-repellent fabric made of certain beast skins, etc.... how to skin, what type of thread to use, how to market and sell...