Well, it would take a long time to find out if I was. In the
  meantime, once I realized I was the only person left on a local
  level, I'd build up supplies and figure out how to run the power
  generators. That'd be the first step. === "How would you feel
  and what would you do if you woke up one day and were the only
  person left on Earth?" a) I would "feel" like I should do
  something to continue living. b) I would gather resources to
  attempt to continue the basics of life-as-I -remember it. c)
  Food, getting electricity started, water supplies. d) From
  there, once I have some sense of SAFETY and security, I would
  develop a routine in order to learn everything possible about
  anything until I die. == Once I reached survivability: I'd break
  down and cry and mourn no longer being able to depend on anybody
  else ever again for anything at all. I'd have to do it myself.
  Whatever it was. I'd have no one to bounce ideas off of, like I
  do right here in this group or in real life. No Google to look
  up answers 'til I got to California and turned their servers
  back on again. No Internet 'til I put it back together again.
  I'd do a lot of writing. Incessant writing. I'd do it for myself
  just in case I forgot anything. I'd do it for any POTENTIAL
  alien visitors or human survivors but again, since in this
  question they absolutely don't exist, I'd be doing it for myself
  and to reinforce my own memory. Once I got the Internet running
  again, ,I'd visit everything I could and start my lifelong
  learning process. It will keep me occupied and I will decide to
  figure out "all the answers" before I die. It will keep me busy.
  == No, I just want the information from as much of the Internet
  that I can. The Internet Archive has a good portion of the web
  archived. I just need their servers to start with. I don't care
  about the infrastructure of the web. It's the data, which is
  simply stored on hard drives and I would access those hard
  drives from their sources. I'd live with the servers as long as
  I needed them. == My first priority would be to gather MY stuff.
  I have some stuff archived there already: My Vines :
  [1]https://archive.org/details/kennethudut&tab=about - 10,000 of
  them are there. I also have [2]http://icopiedyou.com which is
  another archive of my brain online. I have to take care of NOT
  losing my own history first. Then, once that is secured, I can
  explore new knowledge. == I don't want to travel. I want
  security. I'm assuming animals and plants are still alive, so
  they become my worry. Plus the weather. == If I learn enough, I
  could figure out a teleportation device and learn enough about
  medicine to extend my own life a few decades longer, as I'd have
  access (once I learn how to power everything easily) to any
  equipment anywhere, assuming the supplies haven't decayed. ==
  You already removed all life globally and are talking about
  alien rescues. I think I can imagine being able to invent a
  teleportation device, figuring out free energy, and life
  extension beyond normal limits as I'd ONLY have to worry about
  "getting it right" for myself and nobody else. == best part and
  worst part of it is? There will be nobody to tell me I'm doing
  it wrong. No critics. [and also, no critics] = There's critics
  and a society that binds me to obligations. I do the best I can
  within the parameters I'm allowed. == Also, as you can see, I
  like socializing online. I will miss that. I could give up
  socializing online and pursue those things but then I'd miss
  socializing online. ==

References

  Visible links
  1. https://l.facebook.com/l.php?u=https%3A%2F%2Farchive.org%2Fdetails%2Fkennethudut%26tab%3Dabout&h=PAQEW3Ipp
  2. http://l.facebook.com/l.php?u=http%3A%2F%2Ficopiedyou.com%2F&h=lAQFuPPxt