HEALTHY MOOD BOOSTERS~
1. Step back and self-reflect
2. Reach out to someone (Through text, phone conversation, meet-up, social media etc)
3. Listen to music
4. Cuddle or play with pets
5. Go for a walk (Can do this with a buddy, or take your pet if you have one)
6. Drink something healthy and reinvigorating
7. Write (This can be through journaling your thoughts and feelings, or through something that inspires you)
8. Take a nap (Take at least a 20 minute power nap to help you feel invigorated)
9. Plan a fun activity (Take a vacation, a "Day-cation", or even a "Stay-cation" to a nearby town!, or plan time with family/friends)
10. Do something spontaneous
11. Prioritize (Have or make a list of things you've been wanting to do or get done)
12. Look through old photographs or snap some new ones
13. Hug someone (Its a proven fact that it helps you feel better)
14. Laugh (Find a funny movie, or a funny friend that always makes you laugh)
15. Cry (Sometimes you just have to let it out)
16. Read back over old emails or text messages, or listen to old voicemails
17. Reconnect with someone (Find that old friend or family member you've been thinking about, and reconnect!)
18. Write yourself a letter (set goals, inspirations read it 6 months to a year later on the same date, and see how far you've come)
19. Try a deep breathing exercise
20. Cultivate gratitude
21. Re-watch a funny or inspiring YouTube video
22. Bake something
23. Get out of the house (Fresh air is always healthy and helpful in our thoughts and mood)
24. Focus on what truly matters to you
25. Take a negative comment or situation and look for something positive about it
26. Daydream
27. Let some natural sunlight come in (Natural light/sunlight is a proven mood booster!)
28. Take a mental health day- take a day just to relax and clear your head~ (As stated above, take that Vacation, staycation or day-cation.... or perhaps just a drive and clear those thoughts and relax your mind)
29. Color (find your inner child)
30. Dance (Dance it out! turn on that music while working out, cleaning or just for fun)
31. Sing (Turn up your favorite song and belt it out! Sing like Nobody's Listening!)
What a great list!
I also:
Color
Dance
Sing
Eat at the park
@BridgetAileen
Great!
I also enjoy a good picnic every now and then! :)
@BridgetAileen
Awesome Bridget! Thank you for these "add-ons" :)
@BridgetAileen
I liked those so much, I added those to the list above as well! 
@PoliteOcean, there are so many ways we can boost our mood. Hopefully, everyone will continue to add ideas here.
@BridgetAileen
Yes agreed...absolutely
Cuddle a puppy!!!!
@DancingAlong
Yes absolutely a great one Dancy!.... I cuddle mine all the time.
Accomplish a small task.
At the very least something will get done. And at best you may feel better about utilizing your time and accomplishing whether it be a mental or physical chore - it's all growth (for me anyway).
@themainjane, this is so true! 
@BridgetAileen
kinda crazy it's taken me so long to figure this out - still better late than never!!
@themainjane, that's true. There are so many things in my life that I stop and think, "Doh, Bridget, if you'd only known that years ago, things would have been somewhat easier." LOL
Light a candle or use an aromatherapy diffuser with a scent that is pleasing to you
Gardening - grow your own flowers, vegetables or fruit
@exuberantMaple397
Yes! These are also great ideas. Thanks for sharing!
@PoliteOcean This is a great list!
Hopie
@PoliteOcean Gym is my mental mood booster and music and prayer.
@affectionateShade7072
I love these options!
Those are some of my top favorite ways to boost my mood as well!
Thanks for sharing with us!
@PoliteOcean, great! Thank you for sharing it!
Some foods boost mood. Warm drinks are comforting.
Some foods boost mood. Warm drinks are comforting.