um oh wow child i am a mere sixteen years of age, i have no wisdom to give you. but happy birthday!!! here’s a little something:
don’t be afraid to let yourself enjoy the small things. if you like something, GET EXCITED. customise. if you want to change your url to something you think is really rad, do it. change your theme to your favourite design and be like, “holy shit, i love this so much.”
tell your friends how much you love them. share that stupid joke that made you giggle the other day. write a journal entry. get out your backpack and do the homework for that class you never do the homework for, you’ll feel a lot better when it’s done.
text your crush and say hey, you’re a really cool person and you’re kind of important to me!
use emoticons. draw a little sketch, even if you’re not an artist. make yourself a glass of chocolate milk and watch an episode or two (or ten) of a show you’ve been meaning to watch. go back and rewatch an episode or two (or ten) of a show you haven’t seen in AGES.
hug a close family member (parent, sibling, guardian, your pet, whoever. if none of these are available, hug yourself and smile at the mirror).
cook yourself something, be it eggs, mac and cheese, or a four-course meal. you’ll feel productive and remind yourself that you can be self-reliant. draw a smiley face on your hand. take a piece of paper and just draw the cutest hearts you can manage all over it (this is not just a girl thing to do, drawing hearts on shit produces literally all the happiness. this is science).
draw a cloud and colour it with highlighters. this is now your own personal glow cloud to worship.
you can add these things to your daily routine, or you can set aside a day to do ALL OF THEM AT ONCE and just experience the ultimate happiness.
i hope this helped