If you are not already doing these things---These all apply forever for any adult bird (with or without chronic laying):
1. 10 hours sleep each night in a dark quiet space and on a schedule= essential for regulating hormones and immune health.
2. Pet on the head and neck only. The rest is reserved for their sexual partner.
3. Remove access to any shadowy spaces in or around the cage (boxes, huts, tents, nesting materials like paper shreds, blankets, pillows, hollow cavities, low shelves, under furniture, hampers, tubes, even couches (because they are enclosed) NEVER partially cover the cage prior to lights off (unless in cases of medical shock or out of necessity during extreme transport situations) and do not use cages with shelf tops/covered tops--- they create a giant nesting space. For indoor birds, you want light on all sides of the cage during the day. At bedtime, cage should not be covered until lights off and if you do not cover, you should have blackout curtains in the room--- you do not want them to be able to see that the outside of their cage is lighter than the inside....DO NOT let your bird see you removing these---- they do like them/tend to get obsessed with them but they do not need a special place to sleep and the obsession is linked to hormones.
4. Buy some dummy eggs and when the bird isn't looking, swap out the real for the fake because that way, if the bird keeps interest, you can ensure that it won't break or get smelly. My vet said to leave eggs for a minimum of 2 weeks even if no obvious interest is shown (unless they throw them out of the cage themselves)-- Someone already said this, but here is an amazon link
https://www.amazon.com/DummyEggs-Stop-Laying-Fake-Bird/dp/B077C9TMNH -- these should be kept on-hand just in case you have another clutch.
This one kind of depends but should be avoided in general: warm mushy foods can be a trigger--- they mimic regurgitation.