One of the easiest ways to make money on the internet is to write electronic documents (i.e. a PDFs) and post them for sale. These documents could be about whatever you know. They can be short or long but longer is obviously better.However you don't want to put a whole bunch of time and effort into writing something only to get a few sales and nothing more. You want continuous revenue, as in the kind that keeps on coming and isn't just flash-in-the-pan style.This article will outline what you need to do so the documents/books you publish keep bringing in the cash.[hidepost=1]

Information sells better than anything else on the internet

Of all the stuff that's on the internet that is not entertainment, what sells the most is information. You're reading some right now and that's why you paid for PCMech premium account to begin with. It is the information that you deem valuable.When you take on the task of writing for money and are using the internet as a means to sell it, the sale of information is what works better than anything else as a revenue generator. It sells better than fiction, non-fiction, news and documentaries combined.

Ageless information is the best kind

When constructing your written informational works for sale, something to bear in mind is whether it can age easily or not.Let's say for example you write a book about working on engines for the Ford Fusion automobile. Presently this is a current car made by Ford. But someday in the future Ford will stop making this car. At that point your information has aged badly and will sell less and less until it completely stops selling altogether.If on the other hand you write about an ageless subject, such as how to grow perfect tulips in your garden, this information does not go obsolete. The information you write about can be used today, a year from now, 5 years from now and so on.To note: There are times when it is okay to purposely write on a subject that will become dated/obsolete as long as you understand that's what will happen in the future.

Revisions work

If you happen to write something that proves to be successful - even if only to a moderate degree - consider updating your written work from time to time and re-releasing it as a newer revision. Authors do this all the time and it works. Even if you only change a few pages here and there and update what is now obsolete from the previous version, if people value the information you present enough, they will buy it again. And it will attract new customers as well.

Reader feedback works

I will state up front that reader feedback may backfire on you because you may receive communication that may be outright insulting to you (because people love to complain more than compliment). However when used correctly it can be a good booster for sales.The best way to get reader feedback from a written work is to contain information on how to contact you within the work itself.If you are seriously interested in getting feedback and getting it fast, input your e-mail address in the introduction of the book. You can dedicate a small paragraph to it and state that any/all feedback on the content is greatly appreciated or something to that effect.Assuming the book/work you have is selling, the small passage about how to contact you in the introduction will kick-start reader feedback.Just remember you may not always hear what you want to hear. :-)

Consider publishing on multiple self-publisher web sites

Usually what most people do when they self-publish a work on the internet is use just one web site to do it. But you may be missing out on extra sales by doing this.For example, Lulu and Cafepress both offer the ability to self-publish books easily, so you might as well use both.Even if one service sells well and the other barely does anything, stick with it because all sales count. In addition the work is "broadcasted" more on the internet in this fashion by having it in two places at once.[/hidepost]