I came into this a bit late, but I would vote for bonuses as well.

A bonus is something nice and unexpected, a reward and recognition for extra effort. That is, theoretically, what a raise used to be, but most people have now come to expect a raise every year.

A side note, a bonus doesn't necessarily need to be cash either. One year, a company I worked for gave us really nice computer bags and a gift card for Best Buy (it was a tech company). I still use the bag and I haven't worked for the company in over two years.