I have no prior experience of getting myself featured on the publications that you have listed. The closest that I got was mentions of my blog posts by influencers such as [Mari Smith and [URL="https://plus.google.com/+GuyKawasaki/posts/8feiipqpBgo"]Guy Kawasaki](https://www.facebook.com/42328360008/posts/10151029437765009).
Personally, I think that instead of constantly pitching the publications to have your content featured, try spending more time crafting high quality content for your own blog or smaller blogs within your industry. Sometimes, in order to stay away from the huge echo chamber happening online these days, the writers and editors may be subscribed to these smaller blogs to find quality content by lesser-known authors which they can share with their followers.
At the same time, try to interact with writers and editors of these publications on the various social media platforms. Leaving a constructive comment on their articles or blog posts does help to leave a positive impression too.