Draw what you want to carve after cleaning up the inside of the pumpkin (by making a hole on the top (near the stem)).
Once you are satisfied with the drawing, start carving with the knife
You can make pointy ears with some of the flesh from carving the mouth area.
And your lantern is ready. Just place it on your porch and light a candle inside it in the evening time. Dollarstore has those candles with battery operated, which won't make you come out many times to relight when the wind blow the light off :)
With the same method of drawing what you want the pumpkin to look like, once it is cleaned, drawn, carved, fill the sock with dry leaves.
Insert this filled sock to a boot/shoe then stick it into the pumpkin's mouth
Squeeze some red food coloring as blood and it gives a more dramatic result to your pumpkin :)