For my work I'm trying to move from a one-monitor-inbox zu an inbox with zero items per GTD. I'm using Outlook 2007 and keep all my GTD-lists in tasks. My job is software developer, I regularly get bug reports or todos per mail.
Before reading and implementing GTD I kept my inbox at approximately one monitor length and used this as a sort of todo-list. Now cleaning my inbox zu zero and process the contents via Next-Action-Lists is just as fine, but has one major drawback for me - creating a task from an email prevents me to answer the original mail effectively, simply because I can't "reply to" an Outlook task.
How do you organize this? Create tasks for all tasks and have additional folders for the GTD categories as subfolders of your inbox? For me this is kind of cumbersome, because then I do not have ONE task list, but many. Is there a nice and easy working example out there which works in Outlook out-of-the-box?