First, the link: http://www.chrisfoxwrites.com/2017/04/22/week-9-crafting-a-blurb/
Skip the first five minutes, where Chris is talking about non-blurb stuff. If you only want the actual shots of his blurbs as he talks about them, go to 6:36 in the video.
“Every single word has immense value.”
He uses blurb examples from his own books. Might help you with your own blurbs.
Think about how you can add a strong, hook-y tagline to your blurb.
He also suggests looking at books in a similar genre niche as one’s own (as I have suggested, too), to see what those blurbs look like.
Look at the bestsellers and their blurbs. Is there a pattern? Is there something that inspires you?
And Chris is right: the tagline of IRON DRAGOONS is terrific. I don’t read that genre, and I found it cool.
I like his point that having a blurb there for preorders helps. It’s a selling tool, so never leave that part of the item page blank.
Remember, a blurb is not set in stone. Although, if it’s a print run book, it is set on the hardcopy. You can polish and tighten up your blurb online as much as needed. (Probably for POD, as well, though I am not aware how difficult it is to change information at CreateSpace, etc.)
A preliminary blurb for preorders can be completely revised when it finally releases–and after, too.
As an indie author, yes, you can tweak your blurb as much as you want. It’s a tool and tools can and need to be sharpened.