Pretty much what I do, and I find it works quite well, mostly for three reasons

1) I actually give a damn about what I’m writing about, since I had to scrape the brains off of my skull for at least a few hours to figure it out and implement it.

2) I know what to write, since I just went through it, know why I did, and what it’s value was (for me, at least).

3) Since it took me so long, the answer probably isn’t available, or at least easy to find, online, so others are more likely to benefit from it.