One of the sounder bits of usual advice to new grant writers is to get some examples from established scientists. The closer to your field and the closer to the agency you are soliciting, the better.
All true. I can't imagine someone drafting a credible NIH application from the instructions alone.
Where I think the typical advice goes wrong is in emphasizing successful applications. As if this is all you need.
I think new grant seekers should ask their friends and senior colleagues for the losers too. With, preferably, the reviews.
There is much about the NIH review process and one's likely success within it that can be gleaned best from comparing successful and unsuccessful grants.
UPDATED: A prior post on what is wrong with the NIAID sample grants.