Postcard marketing sits on a blog about online business, and that is the most interesting thing about it. Connie Sloneker treats direct mail with the same seriousness she gives Twitter, and the effect is somebody who thinks about reaching people rather than about a platform.
The advertising writing is the useful part. How describing speed changes an advert, whether that means delivery, download or checkout, because gratification is what a buyer is really pricing. Rules for what a Twitter account should and should not do. Video used as advertising rather than as content.
There is practical home business advice too, including keeping business mail at a post box and business money in its own account, which sounds dull until an audit or a lost invoice arrives.
One post reports an event she attended and reads as team encouragement rather than as advice.
Read the ad writing posts if your offer is fine and nobody responds to the way you have described it.