With more people using an iPad as their main or sole computer, How do I print from my iPad? is becoming a more common question. For many folks, the simplest answer is: Don't bother – just email your file from your iPad to your computer. You'll have the full power of your computer to adjust paper sizes, quality, quantity, etc.
But if that response feels like a cop-out here are three more direct methods.
My iPad makes the daily trip to and from the office and so a case is mandatory. For screen protection and business-like appearance, I prefer folio-style leather cases. Sena's Florence (Magnetic Closure) folio case $80 is my current iPad 2/3/4 case. It's pictured at left with my Griffin Stylus $10 securely clipped to the folio spine, & my matching Sena Sarach Leatherskin iPhone case $40.