What are some great inexpensive gift ideas that spouses can give one another?

For a bloke it is pretty easy if you are short of money. Volunteer to take care of Christmas lunch so the Mrs can have the day off and enjoy the day. If you can't cook just spend a few hours on youtube and follow the instructions closely. Recipes are easy to follow if you read the whole recipe before starting and plan for success. Cooking only gets fucked up when people read the first few lines of a recipe and then start the meal. You really need to read the whole recipe (or watch the whole video) so you can do things in the order they should be done.

Well when you say inexpensive do you have a dollar amount or limit? I would say if you live where there is snow nice gloves and a scarf can go a long way. Chenille is always nice doesn't have to be expensive. A nice gift basket with stuff she likes? Maybe some hand cream, nice bottle of wine, cheese and crackers, some nuts. Idk depends on what he or she likes.

write each other something!! Like if you’re gone on a business trip, write him/her a letter to read before she/he goes to bed

Herpes. If you haven't given it to her already, it's time to take the next step

The sex