A rum screwdriver is simple enough: dark rum and orange juice. My recipe came from The New York Bartender's Guide. Once again, ingredient management becomes an important aspect of this hobby. As my wife bought OJ for last week's drink, I had to use the rest quickly (with some welcome help from juice-loving daughter).
The rum did a nice job shining through again this week. Perhaps it's the rum I'm using, nothing special but effective: