It's 13:31 here so that's not bad timing I suppose. I'd do a few things which I'm thankfully already prepared for just in case.

1.) Immediately get in contact with a no-kill shelter for my dog since I know he'll never fully recover, he already lost my younger brother and I'm all he knows left in the world 2.) Multiple copies of will and medical directive, post a public copy of it online signed with my PGP key, ensuring birth parents cannot contest it and try to take control of me in death 3.) Listen to music all day: Tallest Man on Earth, Eli et Papillon, alt-j, are a must 4.) Write post cards and letters to friends telling them I love them, add in doodles and random little things lying around 5.) Call people, I hate phone calls but I want to listen to their voices one last time if I can't see them online or in person 6.) Tell LosT, Elon Musk, Lessig, how much I admire them all even though they'll be like, "Who is this peep?" 7.) Ask my darling honey bee to meet up for dinner, another thing that's really unusual for me but hey I want to see them, talk, hug, kiss, cuddles too hopefully but I know they've got work in the morning so this will be it 8.) Have lots and lots of play time with my dog, so much cuddles and kisses and treats 9.) I'll likely start getting a bit more restless so sleep as much as I can, I want to be well rested 10.) Have sunny side eggs on toast for breakfast, read All the King's Men 11.) Take the ashes of my brother with me outside, go get some fries at McDonalds and a Sprite, get cheesecake after and go to a park to journal and think for a bit more 12.) Say my last good byes and drop Nugget (my dog) off at the no-kill shelter, say last good byes and I love you's to my friends 13.) I'm torn on if I want to do this but if I do burn my journals since I wasn't expecting to be aware of when I die and completely wipe all of my drives, permanently lock all of my social media accounts out so no one can sign in again 14.) Look at the sky and hope I can see some blue, it's supposed to rain tomorrow though so not likely 15.) Head to the hospital since I don't want anyone I know finding me dead