I had a couple of packages go missing and one time my neighbor came over when I got home from work to give me a delivery. She said that some kids in the neighborhood were on my porch where the package was so she shoo'd them away and took the package. They were likely the ones who took the other packages.
I started having things delivered to my work, which has a mailroom, and they call me to come get it or deliver it to my desk on their rounds.