I seem to get the most apples for tutorial posts.
Harvesting seeds from the grocery store was pretty successful, same with
my linen thread and
the cotton v linen tutorials in this thread.
Generally, I gather up the knowledge I have, supplement it with some books and/or google. Write what I know, write it in a way that makes an easy reference with subtitles.
Gussy it up a bit, and engage the audience by asking questions of things I want to know more about.
amaranth thread and
fava bean thread both make good examples. It's the posts I write like a blog tutorial, that seem to gain the most apples.
If I have a chance, I also like to include book references that the reader can get from their local library - and link to the permies book review threads so the reader can see the reviews.
Talking about book reviews, there's another place I've picked up apples. A good book review can often be a good source of apples and pie.
Content that people learn things from, is easy and clear to read (there's only one wall of text person I know who regularly gets apples, but her writing is exceptional), is, in my opinion, the fastest path to apple cider.
Of course, the cider press is a double edged sword.
It's nice to be able to vent our frustrations and explore the more controversial topics surrounding permaculture, however, it's also a place where people have been known to earn apple cores (aka, loose apples).