How do you know which category your WikiAnswers question belongs in?

To have the best chance of being answered, a question needs to be asked in the best place.

Start by just asking the question with an "Ask a Question" link. After typing in your answer and making any appropriate improvements you'll be prompted to place the question in the best FAQ. Take some time here. Click on the top-level FAQ topics to see the sub-topics. The more specific topic you choose, the better.