I recently had to search some historical facts and used History Stack Exchange. I noticed that community there requires people to provide evidence of attempt at finding solution even to non-homework questions. For example, questions lacking any demonstration of attempt at searching answer will commonly get following notice from mods:
Welcome to History:Stack Exchange. Thank you for your question; please consider revising it to be more in line with our community expectations. Like many other stacks, we expect questions to provide evidence of prior research. That helps us to understand the question, and avoids our repeating work you've already done. Our help center, and other stacks provide additional resources to assist with revisions.
Moreover, the same posts also often get notice that Giskard suggested would be worthwhile using on our site.
I think it would benefit our site as it would reduce number of questions that essentially boil down just to 'please google this or that for me'. I noticed that there is non-trivial amount of such questions on our site (e.g. see here - (just casual googling reveals GDP datasets by sectors), or requests for literature without any prior google search (like this one, sometimes even from higher rep users). Or this fresh post.
The post notice would not mean immediate closure/deletion - that is not what they do at History.SE as far as I can see, but it would serve as a reminder for community to consider closing down, and feedback for the user that the question is sub-par with links to useful post offering further guide on how to improve it.
In addition, following Giskard suggestion we already expanded the use of the post notice for unsourced answer. However, many of you might not even noticed because this was usually till now done only for answers/questions that received one or more low-quality flag or were severely deficient (and often further mod investigation showed user was troll so question/answer was deleted), but on History.SE they have further rule that if answer refers to external knowledge it should provide source for it.
I think adopting the practices they use at History.SE in our stack would help to increase quality of both the questions and answers as they evidently did at History.SE (I recommend anyone to just take a look at their stack).
I would like to know if there is any support (or lack of thereof) for doing this form the community.