The best method is to find questions relating to your niche.
To find niche-specific questions that are still open for answering, click on the “Advanced Search” link to get started.
Once you have loaded up the Advanced Search page you will be able to enter in keywords that are relevant to your niche market. Enter in you’re a specific keyword that best describes your niche and set the “Keyword Match” to “Questions” as you are searching for questions to answer right away.
To begin answering questions, simply click on the links to load up the “Question and Answer” page.
By answering questions that target your niche market and including a website that provides additional information, you can easily generate traffic to your site in a few minutes.
For more tactics download the Yahoo Answers Traffic Guide