Earth, population: (you)

Truly a badass

That is a really interesting point. Sanity is a purely relative concept. Mental illness is real, but sanity is a value judgment which is wholly dependent upon a sane viewpoint. If you were the last person on Earth even if you were shitbird psychotic it wouldn't matter at all.

Wild!

Humans are very social creatures. They nees to be able to communicate properly with one of their own. Even people that claim to hate everybody would begin to go insane without another human to talk to. Conversations with yourself, imagining your dog can speak, etc. may occur after a while. You would either kill yourself or completely lose your mind over time, and that would begin to affect your ability to function properly.

Assuming electricity still works then it would probably a few hours of me shitposting by myself before I realize every other fag who uses this site suddenly isn't there anymore.
Celebrate for a little while and then panic over how I would survive.
Liquor store, then grocery store.
Immediately start reading up on hunting and farming so I don't die as soon as the grocery stores run out of stuff for me to eat.
Masturbate. Masturbate. Don't need company, I haven't actually talked to anybody outside of imageboards in a couple of years, and even then I only do this out of habit.
I'm not even entirely sure I'm sane right now, but probably not long.

Starsha of Iscandar did it and so can you

A person facing this situation has basically two long-term options. One is a nomadic existence, raiding stores for supplies as you go along.

The other is to settle down somewhere, like taking over a farm in the country. It would be work, but you could have fresh vegetables and meat if you were willing to put in the time. As a bonus, you would stockpile wood and stay warm in the winter, basically living the same existence as people did 100 years ago, but with modern equipment and knowledge.

Something else you could do is find a diesel truck and convert it to biodiesel so you would always be able to drive around to the nearest town for supplies and things, maybe even convert a small tractor to make the farming a lot easier.

It would be hard for a city person like most all of us to figure this out (especially by yourself, with nobody to help), but I think it would be do-able in the long term. For the short term, we would have to stockpile a lot of canned goods to survive until the farming started working out.

Whatever you decide to do you better hope to christ that you NEVER get hurt or trapped.

Being able to fly an airplane would be a distinct advantage, but it really isn't something you want to learn on your own. Crossing the ocean by boat can be easy, but it can also be very dangerous. I would tend to think that unless there was a damn good reason for the risk, you would want to stay on the continent you are already on. Which sucks if you've always wanted to visit someplace across the ocean.

[citation needed]

How are you going to handle deicing, maintenence, and calibration without multiple men?