Quick question, do you know of any walkthrough sites that focus on just the really essential tips so you don't get stuck in a game?

I'm mostly thinking about those old graphic adventures with terrible designs, especially the ones where you can do something wrong that messes up your progress later. They let you make that mistake, don't warn you, and sometimes you don't even realize you're stuck, you could be locked in a dead end and not even know it.

Do you know of any site that focuses on that kind of thing? Not full walkthroughs, just some warnings to be aware about key moments to watch out before moving on.