If you have a house, you can place a bed in it and use it to “sleep.” This will restore from 50 to 80 labor points each day. While this is subpar on its own, you can buy sleeping pajamas with vocation points to get you to +200 labor points on top of that. You get the pajamas from a vocation badge merchant.
You can also sleep in a bed at any community center. It will give you 100 labor points, but it costs 2 Gilda stars, so it’s debatable if it’s worth it.