Most marketing blogs pick one channel and defend it. Rob Fore published across all of them for years, treating article marketing, mobile, video, network and affiliate work as separate crafts with their own rules rather than as fads to be chased in turn.
The mobile posts are unusually honest about confusion. He writes about a channel where almost nobody leaves the house disconnected from a phone, then admits how genuinely hard it is to know what works there, and settles on watching what competitors do and asking your own market instead of guessing at it.
Article marketing is the deepest seam here, running to well over a hundred posts on syndication, getting the technique right before you begin, and using free reports to earn attention rather than simply demand it.
This is a reference shelf more than a story, so read it that way. Find the channel you are actually stuck on and work through that run of posts.