Meals included in the ticket fare are by default vegan (should be cheaper for SAS) and if meat dish is desired then it is a special order at an additional cost.

Stand up seats for shorter flights.

Have a separate bin to put old baggage tags and recycle them. Not together with ordinary waste.

Include meal information as early as possible in-app.
This is good for people with allergies, so they abstain from it.

Fill up empty seats by selling affordable return trips to unknown/secret destinations. Pick the destinations among those that have low occupancy close to departure time.

When I am flexible for when to fly, I would be open to SAS selecting the actual flight, getting to fewer, fuller flights.