I also say My hubby, adult kids and my 2 grand-daughters put a the biggest Sile on my face, and that they our all happy and doing great, I am truly a lucky women
Seeing a family member that I haven't seen for awhile, seeing my fiance', seeing my dog and cat do funny things, watching the sun rise or set, smelling the fresh scent of rain, listening to a favorite song, hearing a good joke....
Some comedy programmes make me smile, we have just seen the last episode of a silly one called "The IT Crowd", that is on my list.
Also I just have to think about my dogs and I smile. Colleagues at work know this now and use asking about the dogs to distract me if I start getting het up about something. Manipulative bunch!