Where do you keep your list of higher levels?

[Cpu_Modern]

Where do you keep your list(s) of higher goals? Do you keep them all in a simple .txt or .doc file that you review weekly?

In principle "yes", however .doc is too vulgar for my developed taste in file-formats and word processors. So, it's an .opml but the basic attitude is the same.

Just looking for/at the different "systems" out there?

I have them in a (digital) folder in my standard-GTD general reference plus project support filing system. The folder is named "goals", or similar, and the files are named by the dates the goals are active. (It is also easy to re-activate something by duplicating the file and just renaming it. But, I guess with HoF this is not a too often exercised use-case .)