Using "Secret Weapon" for GTD and Evernote
I've been using Evernote for GTD for several months, and I had a similar problem of too many non-actionable tasks at first. I've tried to implement The Secret Weapon (http://www.thesecretweapon.org/) as a way of integrating GTD and Evernote and it's been working for me.
For each project, I use a PROJECT PLANNING note where I name the project, identify key information (other team members or important contacts ...), then I have a section on that note called NEXT ACTIONS and a section called BRAINSTORMING. My NEXT ACTIONS section is a list of all actions that I can think of that relate to this project, but I select the one or more actions that can be tackled now and create new individual notes for them. I tag the new notes and the PLANNING note with a project name tag, then I tag the one or two next action notes with a tag for when it needs to be done (0-today, 1-next, 2-later) and a tag for context if I need that (@home, @office, etc.).
When I complete an action, I remove the context and time tags and add a new tag called ACTION COMPLETED. I review my project planning note, select the next action, and start over...
I'm sure there are many ways to improve what I'm doing, but this is working for me for the time being, and I know it will evolve as I get better at this.