1:1 Passing comments, affirming their work. Be brief but specific about what you liked
1:1 Sit down. A bit more expansive. Examples of what you liked, and a few about what you'd like that you didn't see.
Group praise: Offer simple acknowledgments in front of the team, using an example for all to see.
Long-term memory. Dig back and call to memory something they did a while back too. And generalize from them, that the staff seems to be on their toes.
Figure out what good performance means to you, and use these words around the workplace. "Initiative". "Instinct." "Involvement." Whatever yours are. People will quickly understand what makes you admire people and will understand who to become admired themselves.
I personally avoid "crafted" recognition campaigns. They're thin and the better staff see right through them. Demotivating.