Will my target audience realistically buy this now, or at a different time? Be sensitive to sales cycles and seasons. Maybe you should avoid holidays (when people are away from their computers, like July 4 in the U.S.) or maybe you should target holidays (like the day after Thanksgiving), but know the difference. Again, know your audience. Plan your content accordingly.
A lot of really awesome tools on this list. A few that I wasn't aware of that I can now add to my arsenal. I've come across a really great tool for anyone that uses a lot of different channels for paid marketing, called Funnel (funnel.io). It eliminates all the tedious time that it takes to aggregate all of your spending data. They currently support integration with more than 400 advertising sources and you can either use their built-in dashboards for analysis or export to a data warehouse, BI tool, or even Google. It's an amazing time saver for anyone who has ever spent an insane amount of time gathering data that seems to be outdated even by the time you've gotten it all together. Might make a nice addition to the list!
Whenever advertisers look for direct display ads or sponsored post ads on any blog or website they usually look for the metrics as those are the only signs via which one can get idea about the quality of website before even contacting with the owner. Getting targeted visitors via traffic generation tool will improve the rank and the rank will help you to get more advertisers who will pay you.