Capacitive screens are great, but they have their limitations. They can't be used while wearing gloves, and they're also not terribly precise when using your finger to control screen elements. A fix for both of these issues can come with a capacitive stylus, which is a special stylus that can be used with a capacitive screen like that found on the iPhone or Nexus One. The unit shown in this video was found on eBay for about $5 and worked quite well.