One of my concerns was that My Task List note in Evernote was going to get very long and hard to navigate if I kept adding to the bottom of the list. At the end of June I made a copy of the note and renamed it to z -- My Task List -- 26 June 2015 and moved it to my Research notebook.
Now that I had a copy of My Task List note I reviewed my original note and realized that I did not need to use date headings and removed them and all completed tasks. I saw that most of my to dos were topic related mostly by surname. With a little rearranging I came up with my new to do list for the month of July. As I add more notes TaskClone pulls the to dos and adds them to the bottom of the list. I cut and paste them in the correct area.
At the end of the month I will make a copy of the note, rename it (following the naming scheme I have already used), move it to the Research notebook, and then delete all completed tasks from the original My Task List note. By creating a copy of the note and saving it for the previous month I am able to see what has already been done and retain the links to the information in the notes.
Have you tried TaskClone yet??