For those who might have missed it in an earlier thread, provided below is a link to Lester Dent's Pulp Fiction Master Plot.
Dent was the originator of the Doc Savage series of books, a master of pulp fiction and real-life adventurer. His writing advice is specifically tailored to the pulp-era markets, but is surprisingly effective even today. So if you're struggling to put down that next paragraph, can't decide on where your story is heading, or are just in the mood to learn from one of the masters, may I recommend a quick read of the Master Plot.