11:48 PM
It's ridiculous -- I love Scrivener but I've barely read the manual and I KNOW I haven't used 75% of its features. :)
What's awesome for me about Scrivener is the ability to collect all my "note scraps" in one spot. I can create a zillion notes and pages and documents and organize them in nested folders, and then with one click I can open all those folders and have them at my fingertips.
I can collect notes from all over the web, entire Wiki articles, chunks of research from books, whatever, and split my work panes so I have my writing or my plotting notes on top and my research at the bottom, and work from there.
Scrivener allows you to include images and video (and I think sound) as well. A big part of my character creation process is visualizing the person, so sometimes I have to "cast" my characters using actual people (often actors, but illustrations as well). Having a photo of my lead guy in front of me helps me to write in his voice.
Whether you can successfully use Scrivener to organize your plots and so on depends on how you have them on paper. I had one novel which covered a 25-year period with flashbacks, so I had one main folder for each time period and then organized in the order they appeared in the storyline. Any notes, thoughts, etc. which dealt with a time period went into the appropriate folder.