Thanks for all those responses. It has helped make more sense for me.
I'm going to do one filing draw current project files a to z, a tickler 43 folders, someday/maybe, waiting on, and another draw reference a to z. Oh and I'll also have another "weekly review" paper folder with project list, areas of responsibility, goals for the next 1 to 5 years.
Then I will also have digital files in the same formats on my mac and Evernote account.
I'm also trying the Next Actions on paper for a while. I have been trying various "to do" software and find it's too much out of sight out of mind. Also I haven't been doing a proper weekly review so if i can get that done I think I'll be on the right track.
I feel like I'm on the cusp of a life changing experience through GTD!