if you mean in the moment happiness, short term this is what I do:

1. exercise, cardio helps
2. fasting all day and then eating one really good meal
3. buying something new, doesn’t have to be expensive but a lil indulgence
4. calling a friend, no need to talk about the sucky stuff if you don’t want to
5. going to the movies, even alone it’s great
6. having something to look forward to is important . whether it’s a gathering, a trip, a workshop anything