The broad things people would get help with already do exist. I, personally, don't see a need for anything further.

For roleplay stuff, Roleplaying Discussion.

Non-RP stuff, off-topic is sort of a catch all. In a ways, the site's OOC tab.

This forum, well, indicative of that form of help.

RP seeking help comes in interest checks.

What viable form of help can't be classified into an existing forum?