"preferred methods of preparing plants for shipment"
This is my policy:

To devide and or take cuttings, in advance of a trade to be listed. I place divisions aside in a pot of their own keeping them on the dry side for shipping. Cuttings are left out to callused off in a timely fashion before being offered up for trade.

Shipping:
As always, I only ship Priority Mail in a mailing box or bag with the roots wrapped with a slightly damp paper towel and covered with a plastic bag.
Notice:
Some plants are shipped dry root to prevent rotting, not all plants can be shipped with damp roots.
The rest of the plant will be wrapped in newspaper, and if I have it bubble-wrap to fill in the packing if not then it will be newspaper. A label will be placed on the box or bag stating: "LIVE PLANT AND OR SEEDS HAND CANCEL, PLEASE HANDEL WITH CARE." I ship out on Mondays only in late mornings or early afternoons unless otherwise requested. Track & Confirm numbers (info) will be agreed to be provided upon request prior to the closing of the trade.

Thanks, farmerted361