Writing online is not only about writing more articles in the Internet. It also includes proper organization and documentation. With hundreds of articles written for writers, proper documentation is necessary. Saving the articles on a word processor is also good, the captured actual web page is a proof that the articles was published under your name, it is timestamp, comments may also be included for your future reference.
One easy to use converter from html web pages to PDF format is the free use from htmlpdf.com. I have been using the converter for atleast a year now and I find it very useful and easy to use. There are also options to choose like if you want the PDF in portrait or landscape, A4 or letter size and more.