I'd set it up as a behavioral mirror. Naturally I have a horse in this race :)

Inputs would be the actions you take in life (choices you've made) and how they relate to your goals (which depend on actions). Output would be an interactive visualization of past actions. The purpose would be to help improve the quality of your choices (actions you take) to better achieve your goals. Algorithms would work with the accumulated information to pull out correlations, patterns, and in general accelerate the process.

No Internet required, and so much greater security, privacy, and trust than usual. Which is freeing in many ways.