In writing a hub, I make sure I have the article written beforehand.
Then, I decide on the design of my hub. I usually include a picture for identification. Here is where I also decide which capsules are useful and how many relevant Amazon ads to add.
I intersperse the text capsules with other capsules and do not usually put Amazon ads in a long list at the end. I know when I'm finished reading a hub, I don't bother to look at anything else. I don't know if other readers are similar. I also add a description to each amazon product.
After I have the capsules filled, I decide on appropriate links.
I always preview the hub before publishing, make sure that I assign the hub to a group and ensure that I write a very brief hub summary.