People have different reasons to write a blog. You may do it for ads, to connect with others, to practice your English (like me!) or improve your writing skills.
This a question that everyone who wants to start blogging will face. Even someone who already blog for a while, will question this again as well. You may call it "writer's block".
This is my not-so-secret formula. I write something that's new for me. Now it puts me on the opposite side, where I have too much to write since there are many things I don't know yet.
If you're like the 99,99% of us, you'll have a bug in your application. When you finally solved it, why don't you share it with the rest of us?
I often got a similar if not the exact same bug. Now.. instead of exploring google results pages, I can go to my blog and easily search for it.
If the solution you found is from Stackoverflow, Github issue or other people's site, don't forget to give a link/reference to it.