In the last time I had achievements for my great effort, for which I felt very happy and the people I am close to also felt happy for me!
I don't reward myself with a cheesecake, but with little things that I like... a super delicious ice cream, or a dinner in a restaurant, simple things that I like... also a dinner out of the ordinary with the family or buying something for myself for personal use. This is how I have rewarded myself and it's great!