"Apollon (Apollo) is the Olympian God of prophecy and oracles, music, song and poetry, archery, healing, plague and disease, and the protection of the young."
Wine diluted with pure water
Golden objects such as gold bowls, gold wine cups, flakes of gold, etc.
Bows and arrows, real, toys, or art
All musical instruments, especially stringed instruments
Wolf and/or dolphin imagery
Any images of birds, especially crows and swans
Yellow, gold, and white candles
Incense such as frankincense or myrrh
Chocolates with orange or lemon flavors
Gems such as amber, sunstone, and yellow sapphires
Laurel tree branches or leaves
Golden jewelry or jewelry of the sun or arrows
Divination items (tarot cards, pendulums, etc.)
Wolf and/or dolphin art, toys, or photos
All bird feathers, but especially swan and crow feathers
Donate to medical charities
Support up-and-coming/indie artists and musicians
Play musical instruments for Him
Make a playlist for Him and listen to it daily
Take care of your mental health and remember to take your medicine, if you have any
Try different types of divination
Try and wake up early and watch the sun rise
Go for a walk and feel the warmth from the sun
Let more sunlight into your home/room
Learn a musical instrument or how to sing
Learn simple medical care, like CPR
Learn about His history, His mother's history, and His sister's history
Wear yellow or orange clothing
Pray to Him and speak to Him often, things to consider praying for are guidance, healing/good health, inspiration, a prophecy or truth
Official artwork from Rick Riordan's Percy Jackson
https://www.theoi.com/Olympios/Apollon.html
https://vocal.media/futurism/ways-of-worship-apollo
https://occult-world.com/apollo/