How to read PDF books

Introduction
Oftentimes we find interesting books online, download them, but don't finish reading them. Well, here is way to keep track of what you have read so far.

Steps

 * 1) Whenever you have read several pages of an interesting book which you would like to complete reading, Save-As it to a specific folder, and modify the filename by appending "(PAGE X)" to the beginning of the filename.
 * 2) Next time after you have read more pages, simply modify the filename again by changing X to the page number where you have stopped reading.

Tips
You may also consider using the readers (such as Foxit reader instead of Adobe acrobat reader), which support markup and drawing ontop of the PDF document you are reading.