To improve:

• Piano
• Bass guitar
• Drive a manual car
• Snowboard
• Naming all 50 states in alphabetical order
• Identifying all 50 states on the US map
• Cooking

To learn:

• Fish (inspired by that silly quote)
• Photoshop or some kind of digital imaging
• Drums
• Cello
• Basic car stuff. How to jump start a car, etc!
• The US presidents, in order!