Obviously questions not about Blender would be off-topic but what should be the general yardstick for off-topicness?

Update:
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Since the site has [moderators](https://blender.meta.stackexchange.com/questions/165/moderator-pro-tem-announcement) now and we can better address on/off-topicness, we feel it is time to start rolling out some of these to our **[help page](https://blender.stackexchange.com/help)** where needed. This is so we can have *one* definite place to point new users to.. etc.

It is also worth noting that none of these were thought up by any *one* person. These were decided to be the norm and are only here because of them being agreed upon by the majority. Poke around meta or browse through the [discussion](/questions/tagged/discussion "show questions tagged 'discussion'") tag to find these.