I am huge fan of mindmapping for my horizons of focus. I use MindJet MindManager. And I mindmap from the 50k all the way down to 20k and even some 10k and what I call 5k (actions) and 0k (habits). From the nodes (20k, 10k, 5k), I like to my list manager (Evernote) where I track all my projects and next actions. I feel like I have a really nice linkage between my daily grind, and my horizons of focus. It's pretty easy for me if I'm stuck with prioritisation to pull up the right node in my Horizons of Focus mindmap and climb the levels until I'm clear about what's priority.