Here's my workflow, I have an "action" page which containing multiple bullet lists. Whenever a task/thought occurs that requires action i put it into my action page under a heading it belongs to.. like <myresearch>, <myDayJob>,<MyHobby>, so i don't lose any tasks. Everynite i pick some things i need to do tomorrow, and add them to my cell phone tasklist, which also carries my calendar for meetings/events etc. And thats it.
All day i just keep track of my phone task list, cos it's just shorter and i don't have to be look at the bigger list.
project taskulus.reliability.history.milestone36
1. cleanup scheme:30min
2. add observed_in_task field and test:30min
3. add HTML generator for event history:1hr
It's basically like microtasking :)
That being said, these people have had some success with using Things as a GTD tool:
http://deadsilversky.blogspot.com/2009/01/gtd-with-things.ht...
http://corfield.org/blog/index.cfm/do/blog.entry/entry/GTD__...