I've had lots of success with GTD, but the one thing I haven't figured out whether to use one master list of categories (action steps, waiting for, etc.), keep a list of categories in multiple locations (e-mail, project plan), or both?
For example, say my boss sends me an e-mail requesting some information, and I need to call someone for a report, then type up a summary and reply to my boss. My next action steps are call Bob, read report, summarize report, reply to boss.
A) Change the title of the e-mail to "Call Bob re xx" and put the e-mail in a Next Actions folder,
B) Write "Call Bob re: xx" in the Next Actions category on a master list,
C) Do both A & B.
C seems to be the most thorough, but it also requires me to keep multiple locations organized and synchronized.
What's your advice