Take some deep breaths
Listen to calming music- Classical, New Age,Christian or whatever makes you feel good.
Go for a walk
Call a friend
Watch a funny movie or TV show
Blow bubbles
Paint or color in a coloring book
Write in a journal
Write to a friend or relative
Watch a sunrise
Watch a sunset
Watch nature- birds, squirrels,etc.
Visit a museum - art, nature, science,etc.
Visit a friend or relative
Look at a photo album
Read a good lighthearted book
Bake something
Take a bubble bath
Burn a scented candle
Garden
Knit or crochet
Get involved in a hobby you enjoy
If I think of any other good ideas I'll add them.