I find elevators uplifting, but sometimes they bring me down.

I'll second that. Another one is babies laughing uncontrollably. Gets me every time.

A joke. At least one joke per day. It can be corny. That makes my day.

A beautiful day in nature, even a gentle rain can.
A purring cat on the lap.
A warm cup of coffee or tea.
Certain books by my fave authors.
Being on the water.
The sound of being under sail, esp after cutting off the motor.
My kids giggling together or separately.
The feel of sun on my face, my hair brushing bare shoulders.
The fragrance of baking bread, cookies, etc...
Coming home to the scent of roast in the oven.
A rousing humor game.
A really good session of YouTube sharing that leaves my sides sore from laughing.
A breeze through my hair.
Certain songs or types of music.
Candlelight.
Certain fragrances (flowers, incense).
A warm bath and unlimited time in it.
Relaxing by a campfire.
Birdsong.
Spending all day in bed with someone. (;
Time off!

If I'm in a bad mood, a little exercise can help. Unfortunately, it can sometimes be difficult to work up the motivation to go for a walk when I'm already feeling grumpy.

For me it is making someone else laugh. Hecklers depress me.

Music, doing something physically goofy to amuse myself.

Laughter and music are huge. Lately when I remember to be present and in the moment I kind of get a rush. That quick realization of what your thinking, feeling, hearing, seeing in a way that's just pure observation, no judgment. It's...freeing. And bizarre.

If I stay away from my phone and computer, I feel soooo much better, but bored.

Random acts of beauty and senseless acts of kindness. And Gifs with Sound videos.

Music, sunshine, nature, humor. Just to name a few

Music

Pretty much anything relating to boobs.

Writing is the other. Not so much the writing, but the response I get from those who read my stories. The more positive I see on the responses, the more encouragement I get to write my future stories.

Circus music get me going. I am a circus fan.

Good music and time alone to myself.

Being around animals, my grandchildren, listening to 60s pop music and the soundtrack to "Saturday Night Fever

Pickin a little banjo. Making music with others. Seeing my great grand kid, a boy, and hearing his laugh. In season, vine ripe tomatoes. Hooking a steelhead. My wife's jokes leading to belly laughs.
Fresh brewed coffee in the morning. Sitting on the porch with the sun shining (lots of drizzle days here in the winter), A favorite CD playing when driving. Smell of baking bread.

Humor, especially if it is irreverent or involves puns.
Good music (my opinion o what is good varies wildly with my moods)
Watching other people having kind, pleasant interactions.
Having kind, pleasant interactions with other people.

When I help a person find beauty in reality and science over superstitious religion,
Making others happy
Cat videos,
Great books
Great music
Great movies

Yes, silly animals - I can laugh myself hysterical! also just sitting on my deck for a while; sure to have one or the other bird or bee or such visiting. singing in my choir is always uplifting too.

Chilling out on tumblr and listening to my music playlist on youtube with noise cancelling headphones. General internet stuff. Reading a fantasy or two for the spike of adrenaline.

I agree mostly

I cannot remain glum and listen to the Numa Numa song at the same time.

Always good to know how to cheer you up!