I don't think that this needs a new section, I think what you are looking for is better indexing and searching on the existing nodes. A single page containing an index of useful snippets would not be particularly useful or maintainable (and would balloon out of all proportion potentially). Something hand-crafted would be guaranteed to be out of date and incomplete. Much better is the output from search or super search.

The Monastery Guidelines go a long way to suggesting how people should make node titles friendly to the search facilities. Granted newbies won't generally reach for search or super search (or Google for that matter), without some prompting.

Maybe integrating the keyword notelet with (super)? search might be a way to start, but there's still the issue of getting people to use it to classify the nodes.