Writer's block hits bloggers who committed to posting daily, and Freddy Gandarilla treats it as a technical problem with technical answers rather than as a failure of character. Two posts attack it directly, and a run on memory sits beside them: games that train recall, herbs people use for it, what the research actually studied.
The marketing half is broad and works through search, email, video, article and mobile in turn. It is at its best when he names a specific tool and tells you what it did, as with the search audit service he tried and the Traffic Travis review, and weakest where the advice could have come from any article directory going.
The post on the Panda, Penguin and exact match domain updates is the one to open if your traffic fell and you never found out why. He explains what each change punished, which is more use than another list of tips.
Skim past the generic material without guilt. Read the memory posts, the search updates, and anything where a product gets named.