Math.SE has a problem with titles. The percentage of questions with the redundant word question in the title is highest on Stack Exchange, by far. Plenty of titles consist of other mostly useless words. We have a nice meta post on writing a good title, but nobody's got time for meta posts.
On Stack Overflow, the words question, doubt, problem, and help cannot be used in titles. They result in a pop-up message directing user to a post about writing a good title:
On Mathematics, problem has several legitimate uses (e.g., in differential equations), and question is legitimate in questions about Minkowski's question mark function. Some other such cases may exist. In view of the above, my proposal is to issue a non-blocking warning when the title contains one of generally useless words. More specifically:
A question title under 40 characters containing one of the words "question", "problem", "doubt" and "help" is very likely to be bad, and should generate a warning.
Something like this already exists: if the title contains the word you, the following message is shown (it does not block the submission).
The message should be different, though:
The title of your question may be insufficiently specific. See Writing Good Titles.
Clarification: the filter is intended for main site only, not for meta.