Add the ability to set a default expiration date when a new document is created. This would be a global setting.
Use case: Every time a new document is created an expiration date of 1 year is set.
Should be either:
a. A drop-down list with options like: 1 week, 1 month, 3 months, 6 months, 1 year, etc.
b. A single field were you specify the number of days by typing a number.