I physically get closer to things I want to experience. I can't learn to sail, for example, if I'm no where near boats, preferably ON one, although within visibility is measurable improvement.
Same with how often I engage with that thing. Once a year becomes once a month at worst, and at best daily (or your smallest frequency of choice.) Again, this is a quantifiable thing I can reflect on and change.
Pseudo-scientific way I have motivated myself to get to experience things I wanted. Getting involved in internet startups (don't judge), learning to sail, finding musical collab projects etc.
I'm a simple man, so a simple rubric like this is effective for me, hope it's at least thought provoking for you.