Ask HN: Where can I go to ask/get answers for general web app dev questions?

The original question I was going to ask was "I'm worried about maintaining my database and backups. Should I use a web based DB instead?". The details of the question were basically me wondering how I can learn enough of DB management to have an okay (90%) confidence that my data is securely stored, and being backed up everyday or whether I should use something like Amazon RDS instead.

I realised that I've asked quite a few of these kinds of questions on HN and stack exchange forums. The question type being general, non application, non language specific web app related questions. These are questions anyone developing any web app will probably have to answer. The answers expected would be mostly in the lines of abstract strategies to solve the problem as opposed to concrete "your solution for this case" ones.

To clarify a little bit, some example questions:

* How to securely store passwords? (answer would be discussion on hashing and encryption with no domain/language specific answer)

* How to handle reset password links? (answer would involve strategies for generating links, how to store the reset link etc)

* The above DB related question.

Is there a good single resource for asking/reading up on these types of questions?