Hi there, fellow Texas Daughter! :)
The general answer to your question is go from the known to the unknown - just because you "know" it's that family doesn't mean that it is. Censuses, wills, deeds, etc are the way you need to go. But:
First, keep in mind that, in general, lineage books aren't acceptable documentation because of the lack of citations for the information within them. You can use them as research road maps, but not as source material, and take them with big grains of salt. Those books are notorious for being wrong. But even if they're sourced, you always obtain/submit the source docs, not pages from the book.
Second, if you haven't already, I really encourage you to take the three GEP classes to have a good handle on what National requires. I look at them as the way to get inside the minds of the genies - what is it they're looking for? It's not hard, just specific, and a change in mindset re genealogy. Where can you look when Bibles and wills aren't available? How can you tweak what is available to prove a generation/a link/a patriot? They're super useful.
Third, your best bet is to go through the "back door" of Family Search and go through the unindexed deeds and wills to find what you need. Bibles aren't that common, really (which is a total bummer); the majority of how I've connected generations comes from doing slogging through that stuff. Also, don't forget your genealogical and history societies that may know about things that aren't online.
And last, make use of the worksheet that is on the National website. I'm a huge fan of it. It keeps everything straight and makes sure you cover all your bases, especially those pesky connections between generations.
If you're going to Fall Forum, I'd love to meet up with you and talk. :) I'll be at Deb Duay's workshops - I hope you're going even if it's just for them. Her stuff is GOLD.