Ever run out of something you need? You know that frustration.

Because you care for your spouse, you would like to help them avoid that frustration. Buy something that they are about to run out of. Favorite hand cream, coffee, snacks, paper, stamps.

Or at the very least, remind them that it is running low and ask if you should buy or order some more. (Why not just buy it? Sometimes, they are waiting for that item to be finished so they can try a new version.)