I disagree with the answer here in thinking that changing the sidebar text won't help. I think that all of the FAQs and tutorials and guidelines here are hidden behind hyperlinks in non-obvious locations and walls of text, so you can't really blame new users for being misled by the name "Health". A user can go from front page to Ask Question to Post Your Question without anything jumping out at them saying that hey, no personal medical advice questions, or read these rules first.
Tour doesn't sound like something you're required to do. I don't know about you, but whenever I try out a new IDE or new web app and the tour comes up, I skip it, because if the designers did their job, the interface should be easy to pick up.
How to Ask doesn't sound like something you're required to read. It sounds like "hey, if you're not sure about something you can check here, or not, no big deal".
FAQ doesn't sound like something you're required to read. It sounds like "hey, if you have a question about the site, it might already be answered here, so if you're curious, check it out, or not, no big deal".
So, it would help a lot to make the salient pieces of information more visible. See The "Just In Time" Theory of User Behavior. Users won't click on a super non-obvious "asking help" hyperlink tucked away in a corner, but I do think they're a lot more likely to read something that's right in their face as they're writing the question.
I feel that a small change to the sidebar text could really do a lot towards preventing off-topic questions from appearing on this site. As it stands, the guidance in that box right now is awfully generic and possibly even misleading:
How to Ask
Is your question about health?
We prefer questions that can be answered, not just discussed.
Provide details. Share your research.
If your question is about this website, ask it on meta instead.
Instead, why not extract the most salient points from the How to Ask page and put it in the sidebar? For example, maybe something like this:
How to Ask
Read the full guidelines here.
Personal medical advice questions are off-topic here on Health.SE.
- We care! And that is why Health.SE cannot give individualized medical advice or diagnosis for multiple important reasons! Such questions will be downvoted and closed.
Focus in on a clear topic, be specific! Phrase it to address the health topic itself, rather than an individual situation. If your question is relevant to more people than just you, and more people will be interested in your question and willing to look into it.
If your question is about this website, ask it on meta instead.
I mean, the Hardware Recommendations Stack Exchange has gotten their sidebar text changed in the past, so this ought to be doable...
Side note: There's also a feature request on Meta SE advocating for making "what's on topic for this site?" more visible, which I think could also be helpful here.