There is a lot of info on this site about sanitation, sterilization, and cleaning. You can search any of those terms and the important threads will be a "sticky" thread.
But to answer your question with a question... what are you sanitizing with? Does the product say that you need to rinse? I use starsan which is a no rinse sanitizer. I spray it on and let it sit. "One step" is another "no rinse sanitizer", but for whatever reason, I can't seem to resist the urge to rinse after using it. In all the brewing I've done I've never once rinsed with boiling water. oh, and sinse you will be boiling your wort in your brew kettle, there is no reason to sanitize it, only clean it after the brew.
good luck buddy! you can start here