[jmhorn]

Best Practices:

• Bubble Envelope
  
• Penny Sleeve, Toploader, AND Team Bag
  
• Masking tape over the top of a Toploader (better yet, Post-It over top held down with masking tape on non-sticky end)
  
• Slightly oversized Toploader
  
• Surround properly secured cards (above best practices) with cardboard before placing them in a bubble envelope (or box)
  
• Surround properly secured cards (above best practices) with Packing paper or bubblewrap if packed in a box
  
• First Class Mail (includes tracking)
  

Not Best Practices (or Shenanigans):

• Plain White Envelope (PWE)
  
• No penny sleeve, Toploader, or Team Bag
  
• Scotch tape or Packing tape ANYWHERE inside the packaging (box or bubble envelope)
  
• Wrapping (or "protecting") card with a paper towel
  
• Postage without tracking or insurance
  

Feel free to agree/disagree, or add to this.