One of the easiest ways to get a project planned or action plan set up is to use TextGenius.  Outline your major milestones or phases, then switch to TextGenius perspective to enter more details quickly. You can type or paste, and your text is automatically converted to timelines and assignments.  You can also plan your entire project using TextGenius.

To begin entering details into your project, make sure you're in the Process (Columns) or Table view. Select the cog icon for the phase/milestone into which you'd like to input details, and begin typing or copy/pasting relevant details.