Leave behind proof that your existence made someone else’s existence better.

The clearest evidence a life leaves is a person who is better off for having known you. Not a general improvement in the world, which is hard to trace, but a specific person who learned something, got through something, or was treated well when it was needed. That is achievable at any scale and by anyone. It also tends to be forgotten by the giver and remembered by the receiver.

Think of one person whose situation you could genuinely improve, and do something concrete about it this month. Keep it small enough to actually happen. That is how this sort of proof accumulates.