Celebrate something small in a big way. Did your five-year-old son lose his first tooth? Did a report you worked on lovingly get rave reviews from your boss? Did you finally clean up the yard? Celebrate. Now's the time.
Do something special. Go out for dinner to your favorite restaurant. Invite people with whom you'd like to share your joy and let them know what you're celebrating. Dress up and pull out all the stops. It doesn't have to be your birthday, your kid's birthday, your anniversary, or the Fourth of July to make a big deal about it.
Draw out the idea and think of something every day you could celebrate in this manner. (It doesn't mean you have to do it. It just means that you could do it.)
If you make a habit of doing this, the smallest events in your life take on greater significance and confer upon you greater pleasure.
— Alan Epstein in How to Be Happier Day by Day