I just found few hours ago some posts about that. It will sure help because it is good info and warning there:

I have a draft email where i manage all that links... otherwise it will be a mess :-)

@thecryptofiend
The Missing FAQ - A Beginners Guide To Using Steemit — Steemit
https://steemit.com/steemit/@thecryptofiend/the-missing-faq-a-beginners-guide-to-using-steemit

@firepower
Dummies Guide to Keeping Your Cool on Steemit! — Steemit
https://steemit.com/steemit/@firepower/dummies-guide-to-keeping-your-cool-on-steemit

@steemitguide
Everything you need to know about Steemit's Permission Keys; Posting,Owner,Active,Memo! Digital Passwords with Unique Functionality, that allows you to Securely connect your Steemit Account with Third-party Services — Steemit
https://steemit.com/steemit/@steemitguide/a-complete-guide-on-steemit-permission-keys-posting-owner-active-memo-digital-passwords-with-unique-functionality-that-allows

@pfunk
How to login with your posting key (and why this is important) — Steemit
https://steemit.com/steemit-guides/@pfunk/how-to-login-with-your-posting-key-and-why-this-is-important

@intelliguy
Steem related apps with YOUR POSTING KEY, and beneficiary percentages. What you need to know. — Steemit
https://steemit.com/steemit/@intelliguy/steem-related-apps-with-your-posting-key-and-beneficiary-percentages-what-you-need-to-know

Placed the security advices links because i still have trouble understanding a lot of things here :-).
Again, hope it helps being centralized (just information, not the chain, hehe).