Keyword density should stay under a fifth of a page, and a file in your root directory can keep search engines away from material you would rather they never indexed. Arsalan Khan collects syndicated posts, and the search one carries the most specific instructions of the set.
The mobile marketing material has a rule worth keeping. Never send a message without a reason, because customers expect something useful from a business and treat anything else as an intrusion, and several campaigns have been wrecked by exactly that.
The home business posts cover the tax deductions people forget, including the share of an internet bill that belongs to the business, and the sensible advice to pick a niche that overlaps with what you already know.
There is a video marketing post and a list of business plans.
Read the mobile post if you have a list of numbers and have been wondering what to send them.