How to clear Concepts in Jsp

Hello,
I have just started learning Servlet and Jsp and I have currently developed Online Shopping Cart using Servlet. Now I am developing the same application by using Jsp. Can you tell me how can I clear my concepts in both Jsp and Servlet. I mean should i just do what I am doing or I do something else? How you people learn both Servlet and Jsp? If you think some other application can help me in clearing my concept then please tell me.
Thank you

There are many good books on JSP. If you want to be a good JSP developer and dont want to go the route thousands of other JSP developers have gone and created spaghetti code -- learn the concepts of JSP really well (JSP,JavaBean, associated patterns etc).
visit java.sun.com and javaranch for online tutorials and forums full of experts.