Real Simple had a nice little feature on doorway accessories for different styles of homes. The one most applicable to a mid-century home is definitely the modern style, which could give you a nice mid-century modern look on your porch.
I really like the modern pendant light (photo above) that they call out, but there are plenty of good items to see if you're redoing your stoop.
On a side note: We've made some progress on selecting a color for our door. We're down to about six shades and leaning towards blue. I'll share soon.