What timesaving hacks or systems have you found to make changeovers quicker and easier?

Ours include: Double duvets (in UK) are 2m square, we used to spend time turning them round before fitting the duvet cover to ensure the label is at the bottom. Now we cut the label off so they go in any way round.

All laundry and towels are plain white, so no separation is needed. We wash towels separately when there's a lot.

Any stains are treated and a big red safety pin attached in the area of the stain so we can check the stain came out before removing the safety pin or segregating for re-washing.

Duvets have 7 buttons along the bottom but we only fasten 4.

What else?