Couponing takes up more room here than marketing does, which is not what anybody expects from a business blog. Sotero Garcia published a dozen or more posts on cutting, collecting, trading and organising them, on shopping in bulk, and on not caring what the queue behind you thinks.
The blogging run is nearly as large, and it has one honest thread in it. Pick a subject you are genuinely interested in, because if you are not, you will stop, and no technique fixes that. Beyond that it covers splitting long posts with subheadings, finding your own voice, and going to conferences if you can afford them.
Then there is stopping smoking, several times over, and green energy, and web design, and personal finance, and a wedding.
None of it is personal and none of it claims to be.
Ninety five posts, dominated by two subjects nobody would have paired. If saving at the checkout matters to you more than search rankings, this is unexpectedly the blog for it.