Hi,
I really like doit.im and am seriously considering signing up for the pro subscription. Somehow to me it just feels better than other GTD apps that I used before.

However, there is one last thing that is ruining my experience on doit.im - sequencing of tasks. I checked online including the previous support forum, and there are many users crying for the feature as much as I do. Just one such request:
http://support.doit.im/entries/508322-Add-dependencies-sequence-of-tasks-

To cut it short, I would like to have a feature that can mark one task as sequence of another. For example, during project planning, I might have 2 sets of directions of tasks to complete that project:
A
--B
----C
D
--E
I can choose to do A or D first, but B can only be done after A complete, and C after B. Same for E, which can only be done after D complete. If all A, B, C, D, E appear in my action list then I will be spending much time analyzing which one that I can do first, while in fact I only have A or D as option. This is the way currently the system sets up and definitely a major time-waster of the system.

I think the easiest way to do this is to have a multi-line input for tasks, then for every line there is a checkbox to select "Is this task sequence of previous task?". Then when user check the box, the system also assign this lot as sequence of the previous task.

When entering single task, the user could have an option to select this task as sequence of any task in the project.

Sorry for the long post :)

Thanks.