What have you done in memory of your angel baby?

They are being cremated and we'll have their ashes, and I'll also be getting a tattoo, but I feel like I need to DO something. If that makes sense? Like for example, I love the idea of planting a tree, and maybe we'll do that in the spring, on what would have been their due date. But I'm not sure. I know if the tree died, that would destroy me and this house is probably not going to be our forever home, so we would have to move away from the tree. I won't release balloons, lanrerns, or anything else like that.