You can use a whiteboard to determine if your snippets are working. You can manually submit the URL and track rankings. You may also choose to check for other featured snippets. You will learn how frequently you will need to do this monitoring in order for your needs to be met. There are many ways to improve, and becoming familiar with and trying new formulas is always a great place to start. Lastly, remember to prioritize.
About This Site
Organic traffic campaigns for websites, blogs, Facebook, and Twitter.