subtasks

I’ve almost finished the GTD book and I am hoping to start working on implementing my system over the weekend. I am currently thinking I am going to start off with a paper-based system until I get comfortable what works best for me. In my work I have several different areas of focus which all...

Most projects are groups of tasks, you do every one of them and voila you can close the project, it's done. Sometimes there are permanent projects though, such as "working on my blog" where there is no "final subtask" but the project stays open indefinitely. How do you handle those projects...