Here's what I do.
1. Disband all units.
2. Transfer the offensive/defensive weapons out.
3. Empty garrisons and transfer out.
4. Turn off auto features.
5. If there are any good corps, I have my CEOs get them. Make sure to not dereg the country until the auction finishes. I close corps too if they cash and no debt.
6. Sell some of the "products in stock." Most countries have 4 production plants.
7. Transfer cash
8. Transfer people.
9. Dereg.
The order may vary some.
Adam