A good start would be to go through every page on the wiki and ctrl-h bitsharesx for bitshares. I found that really confusing when I started learning about bitshares.
Also, there are pages missing like "The Great Consolidation of late 2014" which I assume is about the merger which I have heard mentioned many times and sounds like a very controversial time, but I still don't have any idea of what it was all about, yet I want to know.
It seems like the "Securing Funds" page is an important one that shouldn't be missing.
Cold Storage page doesn't mention paper wallets - and for that matter surely it can't be that hard to make a bitsharesaddress.org. You wouldn't even need a cold storage wiki page.
Downloading the whitepaper requires an email address, and as dissapointed as I was by that I gave it up and still never got the white paper till I found it with googles help.
I could go on and on but don't want to seem like a dick, as it's not like I have the knowledge to fix any of these issues.