Bonuses and increased compensation if possible. If not, then increased autonomy, respect, and trust at the very least. If someone goes above and beyond outside of their job description, they're demonstrating initiative and judgement.

What you shouldn't do that a lot of places do is just give the person more work with nothing else. "Good job, now keep doing that AND all your other work for the same salary. That's cool, right? Your boss got a fat bonus for your work, though."

The very least, you should not reward alternate behaviour like in my example above. That's a good place to start. In some of the cases I have seen, individual contributors got a pat on the back while the others got disproportionate raises, bonuses etc.

In your year end performance review it should show how impactful you have been, not only to your team but to other teams as well, and should be used as part of the consideration for promotions.

Money.