Get something like this with SPD on one side and a good grippy pedal base on the other. You can even install toe clips if you want.



The Shimano version is called the PD-M324 and runs about $70. There is also a version from NAshbar called the Rodeo pedal that is eternally on sale for $25. I've go the Rodeo pedal for my travel bike and it works fine, but some have had problems with it. For a bike I'd use every day, I'd go for the Shimano version for durability.